docs(providers): add honest provider/auth support matrix + improve MissingApiKey error copy

Problem:
- `rust/README.md` on `dev/rust` only shows `ANTHROPIC_API_KEY` under
  Configuration and says nothing about other providers, so users
  asking "does AWS Bedrock work? other API keys?" have no answer and
  assume silent support.
- `ApiError::MissingApiKey` Display message says "Anthropic API" but
  gives no signal to a user who exported `OPENAI_API_KEY` (or
  `AWS_ACCESS_KEY_ID`) that their key is being ignored because this
  branch has no code path for that provider.
- The multi-provider routing work (providers/anthropic.rs,
  providers/openai_compat.rs, prefix routing for openai/, qwen/, etc.)
  landed on `main` but has not yet merged into `dev/rust`, so the
  support matrix actually differs between branches. Nothing in dev
  docs communicates that.

Changes:

1. `rust/README.md`: new "Providers & Auth Support Matrix" section
   between Configuration and Features, split into three sub-sections:

   a. Supported on `dev/rust` (this branch) — just Anthropic. Explicit
      call-out that OPENAI_API_KEY / XAI_API_KEY / DASHSCOPE_API_KEY
      are ignored here because the `providers/` module does not exist
      on this branch.
   b. Additionally supported on `main` — xAI, OpenAI, DashScope, with
      a note that model-name prefix routing (`openai/`, `gpt-`,
      `qwen/`, `qwen-`) wins over env-var presence.
   c. Not supported anywhere in this repo (yet) — AWS Bedrock, Google
      Vertex AI, Azure OpenAI, Google Gemini, each with a one-line
      "why it doesn't work today" pointing at the concrete code gap
      (no SigV4 signer, no Google ADC path, api-version query params,
      etc.) so users don't chase phantom config knobs. Proxy-based
      escape hatch documented.

2. `rust/crates/api/src/error.rs`: `MissingApiKey` Display message now
   keeps the grep-stable prefix ("ANTHROPIC_AUTH_TOKEN or
   ANTHROPIC_API_KEY is not set") AND tells the user exactly which
   other env vars are ignored on this branch plus which providers
   aren't supported on any branch yet, with a pointer at the README
   matrix section. Non-breaking change — the variant is still a unit
   struct, no callers need to change.

3. New regression test
   `missing_api_key_display_lists_supported_and_unsupported_providers_and_points_at_readme`
   in `rust/crates/api/src/error.rs` asserts the grep-stable prefix is
   preserved AND that OPENAI_API_KEY, XAI_API_KEY, DASHSCOPE_API_KEY,
   Bedrock, Vertex, Azure, and rust/README.md all appear in the
   rendered message, so future tweaks cannot silently drop the
   user-facing signal without breaking CI.

Verification:
- `cargo build --release -p api` clean
- `cargo test --release -p api` 26 unit + 6 integration = 32 passing
- New regression test passes
- `cargo fmt -p api` clean
- `cargo clippy --release -p api` clean

Note: workspace-wide `cargo test` shows 11 pre-existing
`rusty-claude-cli` failures on clean `dev/rust` HEAD caused by tests
reading `~/.claude/plugins/installed/sample-hooks-bundled/` from the
host home directory instead of an isolated test fixture. These are
environment-leak test brittleness, not caused by this PR (verified by
stashing changes and re-running — failures reproduce on unmodified
HEAD). Filing as a separate ROADMAP pinpoint.

Does not close any open issue (issues are disabled on the repo);
addresses Clawhip dogfood nudge from 2026-04-08 about users asking
"other api keys? AWS Bedrock도 되냐" without a clear matrix.

Co-authored-by: gaebal-gajae <gaebal-gajae@layofflabs.com>

rust/README.md

@@ -35,6 +35,78 @@ Or authenticate via OAuth:
 claw login
 ```
 
+## Providers & Auth Support Matrix
+
+Before anything else: **know which branch you're building.** Provider
+support differs between `dev/rust` and `main`, and neither branch
+currently supports AWS Bedrock, Google Vertex AI, or Azure OpenAI.
+
+### Supported on `dev/rust` (this branch)
+
+| Provider | Protocol | Auth env var(s) | Base URL env var | Default base URL |
+|---|---|---|---|---|
+| **Anthropic** (direct) | Anthropic Messages API | `ANTHROPIC_API_KEY` or `ANTHROPIC_AUTH_TOKEN` or OAuth (`claw login`) | `ANTHROPIC_BASE_URL` | `https://api.anthropic.com` |
+
+That's it. On `dev/rust`, the `api` crate has a single provider
+backend (`rust/crates/api/src/client.rs`) wired directly to
+Anthropic's Messages API. There is no `providers/` module, no
+auto-routing by model prefix, and no OpenAI-compatible adapter. If you
+export `OPENAI_API_KEY`, `XAI_API_KEY`, or `DASHSCOPE_API_KEY` on this
+branch, claw will ignore them and still fail with `MissingApiKey`
+because it only looks at `ANTHROPIC_*`.
+
+### Additionally supported on `main`
+
+`main` has a multi-provider routing layer under
+`rust/crates/api/src/providers/` that `dev/rust` does not yet carry.
+If you need any of these, build from `main` and wait for the routing
+work to land on `dev/rust`:
+
+| Provider | Protocol | Auth env var | Default base URL |
+|---|---|---|---|
+| **xAI** (Grok) | OpenAI-compatible | `XAI_API_KEY` | `https://api.x.ai/v1` |
+| **OpenAI** | OpenAI Chat Completions | `OPENAI_API_KEY` | `https://api.openai.com/v1` |
+| **DashScope** (Alibaba Qwen) | OpenAI-compatible | `DASHSCOPE_API_KEY` | `https://dashscope.aliyuncs.com/compatible-mode/v1` |
+
+Any service that speaks the OpenAI `/v1/chat/completions` wire format
+also works by pointing `OPENAI_BASE_URL` at it (OpenRouter, Ollama,
+local LLM proxies, etc.).
+
+On `main`, the provider is selected automatically by model-name prefix
+(`claude` → Anthropic, `grok` → xAI, `openai/` or `gpt-` → OpenAI,
+`qwen/` or `qwen-` → DashScope) before falling through to whichever
+credential is present. Prefix routing wins over env-var presence, so
+setting `ANTHROPIC_API_KEY` will not silently hijack an
+`openai/gpt-4.1-mini` request.
+
+### Not supported anywhere in this repo (yet)
+
+These are the provider backends people reasonably expect to work but
+which **do not have any code path** in either `dev/rust` or `main` as
+of this commit. Setting the corresponding cloud SDK env vars will not
+make them work — there is nothing to wire them into.
+
+| Provider | Why it doesn't work today |
+|---|---|
+| **AWS Bedrock** | No SigV4 signer, no Bedrock-specific request adapter, no `AWS_*` credential path in the api crate. Bedrock's Claude endpoint is wire-compatible with a different request envelope than direct Anthropic and would need a dedicated backend. |
+| **Google Vertex AI (Anthropic on Vertex)** | No Google auth (service account / ADC) path, no Vertex-specific base URL adapter. Vertex publishes Claude models under a `projects/<proj>/locations/<loc>/publishers/anthropic/models/<model>:streamRawPredict` URL shape that requires a separate route. |
+| **Azure OpenAI** | OpenAI wire format but uses `api-version` query params, `api-key` header (not `Authorization: Bearer`), and deployment-name routing instead of model IDs. The `main`-branch OpenAI-compatible adapter assumes upstream OpenAI semantics and won't round-trip Azure deployments cleanly. |
+| **Google AI Studio (Gemini)** | Different request shape entirely; not OpenAI-compatible and not Anthropic-compatible. Would need its own backend. |
+
+If you need one of these, the honest answer today is: use a proxy that
+speaks Anthropic or OpenAI on its public side and translates to
+Bedrock/Vertex/Azure/Gemini internally. Setting `ANTHROPIC_BASE_URL`
+or (on `main`) `OPENAI_BASE_URL` at a translation proxy is the
+supported escape hatch until first-class backends land.
+
+### When auth fails
+
+If you see `ANTHROPIC_AUTH_TOKEN or ANTHROPIC_API_KEY is not set` on
+`dev/rust` after setting, say, `OPENAI_API_KEY`, that's not a bug —
+it's this branch telling you honestly that it doesn't yet know how to
+talk to OpenAI. Either build from `main`, or export
+`ANTHROPIC_API_KEY`, or run `claw login` to use Anthropic OAuth.
+
 ## Features
 
 | Feature | Status |

rust/crates/api/src/error.rs

@@ -52,9 +52,23 @@ impl Display for ApiError {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {
             Self::MissingApiKey => {
+                // Intentionally explicit about what this branch does and
+                // does not support so users who exported OPENAI_API_KEY,
+                // XAI_API_KEY, DASHSCOPE_API_KEY, AWS_*, or Google
+                // service-account credentials get an immediate "aha"
+                // instead of assuming a misconfiguration bug. See
+                // rust/README.md § "Providers & Auth Support Matrix"
+                // for the full matrix and the branch differences.
                 write!(
                     f,
-                    "ANTHROPIC_AUTH_TOKEN or ANTHROPIC_API_KEY is not set; export one before calling the Anthropic API"
+                    "ANTHROPIC_AUTH_TOKEN or ANTHROPIC_API_KEY is not set; export one before calling the Anthropic API. \
+                     On this branch (`dev/rust`) only Anthropic is wired up \
+                     — OPENAI_API_KEY, XAI_API_KEY, DASHSCOPE_API_KEY, and \
+                     AWS/Google credentials are ignored. Multi-provider \
+                     routing (OpenAI, xAI, DashScope) lives on `main`; AWS \
+                     Bedrock, Google Vertex AI, and Azure OpenAI are not \
+                     supported on any branch yet. See rust/README.md \
+                     § 'Providers & Auth Support Matrix' for details."
                 )
             }
             Self::ExpiredOAuthToken => {
@@ -132,3 +146,46 @@ impl From<VarError> for ApiError {
         Self::InvalidApiKeyEnv(value)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn missing_api_key_display_lists_supported_and_unsupported_providers_and_points_at_readme() {
+        // given
+        let error = ApiError::MissingApiKey;
+
+        // when
+        let rendered = format!("{error}");
+
+        // then — the message must keep the grep-stable core so CI
+        // parsers and docs that quote the exact substring continue to
+        // resolve, AND it must tell the user which env vars are
+        // ignored on this branch and where to find the full matrix.
+        assert!(
+            rendered.contains("ANTHROPIC_AUTH_TOKEN or ANTHROPIC_API_KEY is not set"),
+            "grep-stable prefix must remain intact, got: {rendered}"
+        );
+        assert!(
+            rendered.contains("OPENAI_API_KEY"),
+            "should explicitly call out that OPENAI_API_KEY is ignored on dev/rust, got: {rendered}"
+        );
+        assert!(
+            rendered.contains("XAI_API_KEY"),
+            "should explicitly call out that XAI_API_KEY is ignored on dev/rust, got: {rendered}"
+        );
+        assert!(
+            rendered.contains("DASHSCOPE_API_KEY"),
+            "should explicitly call out that DASHSCOPE_API_KEY is ignored on dev/rust, got: {rendered}"
+        );
+        assert!(
+            rendered.contains("Bedrock") && rendered.contains("Vertex") && rendered.contains("Azure"),
+            "should tell users Bedrock/Vertex/Azure are not supported on any branch, got: {rendered}"
+        );
+        assert!(
+            rendered.contains("rust/README.md"),
+            "should point users at the README matrix for the full story, got: {rendered}"
+        );
+    }
+}

rust/crates/commands/src/lib.rs

@@ -201,8 +201,8 @@ const SLASH_COMMAND_SPECS: &[SlashCommandSpec] = &[
         resume_supported: false,
     },
     SlashCommandSpec {
-        name: "plugin",
+        name: "plugins",
-        aliases: &["plugins", "marketplace"],
+        aliases: &["plugin", "marketplace"],
         summary: "Manage Claude Code plugins",
         argument_hint: Some(
             "[list|install <path>|enable <name>|disable <name>|uninstall <id>|update <id>]",
@@ -1229,7 +1229,7 @@ mod tests {
         assert!(help.contains(
             "/plugins [list|install <path>|enable <name>|disable <name>|uninstall <id>|update <id>]"
         ));
-        assert_eq!(slash_command_specs().len(), 23);
+        assert_eq!(slash_command_specs().len(), 25);
         assert_eq!(resume_supported_slash_commands().len(), 11);
     }
 

rust/crates/runtime/src/config.rs

@@ -52,6 +52,7 @@ pub struct RuntimeFeatureConfig {
     oauth: Option<OAuthConfig>,
     model: Option<String>,
     permission_mode: Option<ResolvedPermissionMode>,
+    permission_rules: RuntimePermissionRuleConfig,
     sandbox: SandboxConfig,
 }
 
@@ -59,6 +60,14 @@ pub struct RuntimeFeatureConfig {
 pub struct RuntimeHookConfig {
     pre_tool_use: Vec<String>,
     post_tool_use: Vec<String>,
+    post_tool_use_failure: Vec<String>,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Default)]
+pub struct RuntimePermissionRuleConfig {
+    allow: Vec<String>,
+    deny: Vec<String>,
+    ask: Vec<String>,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Default)]
@@ -248,6 +257,7 @@ impl ConfigLoader {
             oauth: parse_optional_oauth_config(&merged_value, "merged settings.oauth")?,
             model: parse_optional_model(&merged_value),
             permission_mode: parse_optional_permission_mode(&merged_value)?,
+            permission_rules: parse_optional_permission_rules(&merged_value)?,
             sandbox: parse_optional_sandbox_config(&merged_value)?,
         };
 
@@ -324,6 +334,11 @@ impl RuntimeConfig {
         self.feature_config.permission_mode
     }
 
+    #[must_use]
+    pub fn permission_rules(&self) -> &RuntimePermissionRuleConfig {
+        &self.feature_config.permission_rules
+    }
+
     #[must_use]
     pub fn sandbox(&self) -> &SandboxConfig {
         &self.feature_config.sandbox
@@ -373,6 +388,11 @@ impl RuntimeFeatureConfig {
         self.permission_mode
     }
 
+    #[must_use]
+    pub fn permission_rules(&self) -> &RuntimePermissionRuleConfig {
+        &self.permission_rules
+    }
+
     #[must_use]
     pub fn sandbox(&self) -> &SandboxConfig {
         &self.sandbox
@@ -428,10 +448,15 @@ pub fn default_config_home() -> PathBuf {
 
 impl RuntimeHookConfig {
     #[must_use]
-    pub fn new(pre_tool_use: Vec<String>, post_tool_use: Vec<String>) -> Self {
+    pub fn new(
+        pre_tool_use: Vec<String>,
+        post_tool_use: Vec<String>,
+        post_tool_use_failure: Vec<String>,
+    ) -> Self {
         Self {
             pre_tool_use,
             post_tool_use,
+            post_tool_use_failure,
         }
     }
 
@@ -445,6 +470,11 @@ impl RuntimeHookConfig {
         &self.post_tool_use
     }
 
+    #[must_use]
+    pub fn post_tool_use_failure(&self) -> &[String] {
+        &self.post_tool_use_failure
+    }
+
     #[must_use]
     pub fn merged(&self, other: &Self) -> Self {
         let mut merged = self.clone();
@@ -455,6 +485,32 @@ impl RuntimeHookConfig {
     pub fn extend(&mut self, other: &Self) {
         extend_unique(&mut self.pre_tool_use, other.pre_tool_use());
         extend_unique(&mut self.post_tool_use, other.post_tool_use());
+        extend_unique(
+            &mut self.post_tool_use_failure,
+            other.post_tool_use_failure(),
+        );
+    }
+}
+
+impl RuntimePermissionRuleConfig {
+    #[must_use]
+    pub fn new(allow: Vec<String>, deny: Vec<String>, ask: Vec<String>) -> Self {
+        Self { allow, deny, ask }
+    }
+
+    #[must_use]
+    pub fn allow(&self) -> &[String] {
+        &self.allow
+    }
+
+    #[must_use]
+    pub fn deny(&self) -> &[String] {
+        &self.deny
+    }
+
+    #[must_use]
+    pub fn ask(&self) -> &[String] {
+        &self.ask
     }
 }
 
@@ -569,6 +625,32 @@ fn parse_optional_hooks_config(root: &JsonValue) -> Result<RuntimeHookConfig, Co
             .unwrap_or_default(),
         post_tool_use: optional_string_array(hooks, "PostToolUse", "merged settings.hooks")?
             .unwrap_or_default(),
+        post_tool_use_failure: optional_string_array(
+            hooks,
+            "PostToolUseFailure",
+            "merged settings.hooks",
+        )?
+        .unwrap_or_default(),
+    })
+}
+
+fn parse_optional_permission_rules(
+    root: &JsonValue,
+) -> Result<RuntimePermissionRuleConfig, ConfigError> {
+    let Some(object) = root.as_object() else {
+        return Ok(RuntimePermissionRuleConfig::default());
+    };
+    let Some(permissions) = object.get("permissions").and_then(JsonValue::as_object) else {
+        return Ok(RuntimePermissionRuleConfig::default());
+    };
+
+    Ok(RuntimePermissionRuleConfig {
+        allow: optional_string_array(permissions, "allow", "merged settings.permissions")?
+            .unwrap_or_default(),
+        deny: optional_string_array(permissions, "deny", "merged settings.permissions")?
+            .unwrap_or_default(),
+        ask: optional_string_array(permissions, "ask", "merged settings.permissions")?
+            .unwrap_or_default(),
     })
 }
 
@@ -991,7 +1073,7 @@ mod tests {
         .expect("write user compat config");
         fs::write(
             home.join("settings.json"),
-            r#"{"model":"sonnet","env":{"A2":"1"},"hooks":{"PreToolUse":["base"]},"permissions":{"defaultMode":"plan"}}"#,
+            r#"{"model":"sonnet","env":{"A2":"1"},"hooks":{"PreToolUse":["base"]},"permissions":{"defaultMode":"plan","allow":["Read"],"deny":["Bash(rm -rf)"]}}"#,
         )
         .expect("write user settings");
         fs::write(
@@ -1001,7 +1083,7 @@ mod tests {
         .expect("write project compat config");
         fs::write(
             cwd.join(".claude").join("settings.json"),
-            r#"{"env":{"C":"3"},"hooks":{"PostToolUse":["project"]},"mcpServers":{"project":{"command":"uvx","args":["project"]}}}"#,
+            r#"{"env":{"C":"3"},"hooks":{"PostToolUse":["project"],"PostToolUseFailure":["project-failure"]},"permissions":{"ask":["Edit"]},"mcpServers":{"project":{"command":"uvx","args":["project"]}}}"#,
         )
         .expect("write project settings");
         fs::write(
@@ -1046,6 +1128,16 @@ mod tests {
             .contains_key("PostToolUse"));
         assert_eq!(loaded.hooks().pre_tool_use(), &["base".to_string()]);
         assert_eq!(loaded.hooks().post_tool_use(), &["project".to_string()]);
+        assert_eq!(
+            loaded.hooks().post_tool_use_failure(),
+            &["project-failure".to_string()]
+        );
+        assert_eq!(loaded.permission_rules().allow(), &["Read".to_string()]);
+        assert_eq!(
+            loaded.permission_rules().deny(),
+            &["Bash(rm -rf)".to_string()]
+        );
+        assert_eq!(loaded.permission_rules().ask(), &["Edit".to_string()]);
         assert!(loaded.mcp().get("home").is_some());
         assert!(loaded.mcp().get("project").is_some());
 

rust/crates/runtime/src/conversation.rs

@@ -7,8 +7,10 @@ use crate::compact::{
     compact_session, estimate_session_tokens, CompactionConfig, CompactionResult,
 };
 use crate::config::RuntimeFeatureConfig;
-use crate::hooks::HookRunner;
+use crate::hooks::{HookAbortSignal, HookProgressReporter, HookRunResult, HookRunner};
-use crate::permissions::{PermissionOutcome, PermissionPolicy, PermissionPrompter};
+use crate::permissions::{
+    PermissionContext, PermissionOutcome, PermissionPolicy, PermissionPrompter,
+};
 use crate::session::{ContentBlock, ConversationMessage, Session};
 use crate::usage::{TokenUsage, UsageTracker};
 
@@ -112,6 +114,8 @@ pub struct ConversationRuntime<C, T> {
     plugin_hook_runner: Option<PluginHookRunner>,
     plugin_registry: Option<PluginRegistry>,
     plugins_shutdown: bool,
+    hook_abort_signal: HookAbortSignal,
+    hook_progress_reporter: Option<Box<dyn HookProgressReporter>>,
 }
 
 impl<C, T> ConversationRuntime<C, T> {
@@ -176,6 +180,8 @@ where
             plugin_hook_runner: None,
             plugin_registry: None,
             plugins_shutdown: false,
+            hook_abort_signal: HookAbortSignal::default(),
+            hook_progress_reporter: None,
         }
     }
 
@@ -221,6 +227,92 @@ where
         self
     }
 
+    #[must_use]
+    pub fn with_hook_abort_signal(mut self, hook_abort_signal: HookAbortSignal) -> Self {
+        self.hook_abort_signal = hook_abort_signal;
+        self
+    }
+
+    #[must_use]
+    pub fn with_hook_progress_reporter(
+        mut self,
+        hook_progress_reporter: Box<dyn HookProgressReporter>,
+    ) -> Self {
+        self.hook_progress_reporter = Some(hook_progress_reporter);
+        self
+    }
+
+    fn run_pre_tool_use_hook(&mut self, tool_name: &str, input: &str) -> HookRunResult {
+        if let Some(reporter) = self.hook_progress_reporter.as_mut() {
+            self.hook_runner.run_pre_tool_use_with_context(
+                tool_name,
+                input,
+                Some(&self.hook_abort_signal),
+                Some(reporter.as_mut()),
+            )
+        } else {
+            self.hook_runner.run_pre_tool_use_with_context(
+                tool_name,
+                input,
+                Some(&self.hook_abort_signal),
+                None,
+            )
+        }
+    }
+
+    fn run_post_tool_use_hook(
+        &mut self,
+        tool_name: &str,
+        input: &str,
+        output: &str,
+        is_error: bool,
+    ) -> HookRunResult {
+        if let Some(reporter) = self.hook_progress_reporter.as_mut() {
+            self.hook_runner.run_post_tool_use_with_context(
+                tool_name,
+                input,
+                output,
+                is_error,
+                Some(&self.hook_abort_signal),
+                Some(reporter.as_mut()),
+            )
+        } else {
+            self.hook_runner.run_post_tool_use_with_context(
+                tool_name,
+                input,
+                output,
+                is_error,
+                Some(&self.hook_abort_signal),
+                None,
+            )
+        }
+    }
+
+    fn run_post_tool_use_failure_hook(
+        &mut self,
+        tool_name: &str,
+        input: &str,
+        output: &str,
+    ) -> HookRunResult {
+        if let Some(reporter) = self.hook_progress_reporter.as_mut() {
+            self.hook_runner.run_post_tool_use_failure_with_context(
+                tool_name,
+                input,
+                output,
+                Some(&self.hook_abort_signal),
+                Some(reporter.as_mut()),
+            )
+        } else {
+            self.hook_runner.run_post_tool_use_failure_with_context(
+                tool_name,
+                input,
+                output,
+                Some(&self.hook_abort_signal),
+                None,
+            )
+        }
+    }
+
     #[allow(clippy::too_many_lines)]
     pub fn run_turn(
         &mut self,
@@ -273,94 +365,124 @@ where
             }
 
             for (tool_use_id, tool_name, input) in pending_tool_uses {
-                let permission_outcome = if let Some(prompt) = prompter.as_mut() {
+                let pre_hook_result = self.run_pre_tool_use_hook(&tool_name, &input);
-                    self.permission_policy
+                let effective_input = pre_hook_result
-                        .authorize(&tool_name, &input, Some(*prompt))
+                    .updated_input()
+                    .map_or_else(|| input.clone(), ToOwned::to_owned);
+                let permission_context = PermissionContext::new(
+                    pre_hook_result.permission_override(),
+                    pre_hook_result.permission_reason().map(ToOwned::to_owned),
+                );
+
+                let permission_outcome = if pre_hook_result.is_cancelled() {
+                    PermissionOutcome::Deny {
+                        reason: format_hook_message(
+                            pre_hook_result.messages(),
+                            &format!("PreToolUse hook cancelled tool `{tool_name}`"),
+                        ),
+                    }
+                } else if pre_hook_result.is_denied() {
+                    PermissionOutcome::Deny {
+                        reason: format_hook_message(
+                            pre_hook_result.messages(),
+                            &format!("PreToolUse hook denied tool `{tool_name}`"),
+                        ),
+                    }
+                } else if let Some(prompt) = prompter.as_mut() {
+                    self.permission_policy.authorize_with_context(
+                        &tool_name,
+                        &effective_input,
+                        &permission_context,
+                        Some(*prompt),
+                    )
                 } else {
-                    self.permission_policy.authorize(&tool_name, &input, None)
+                    self.permission_policy.authorize_with_context(
+                        &tool_name,
+                        &effective_input,
+                        &permission_context,
+                        None,
+                    )
                 };
 
                 let result_message = match permission_outcome {
                     PermissionOutcome::Allow => {
-                        let pre_hook_result = self.hook_runner.run_pre_tool_use(&tool_name, &input);
+                        let plugin_pre_hook_result =
-                        if pre_hook_result.is_denied() {
+                            self.run_plugin_pre_tool_use(&tool_name, &effective_input);
+                        if plugin_pre_hook_result.is_denied() {
                             let deny_message = format!("PreToolUse hook denied tool `{tool_name}`");
+                            let mut messages = pre_hook_result.messages().to_vec();
+                            messages.extend(plugin_pre_hook_result.messages().iter().cloned());
                             ConversationMessage::tool_result(
                                 tool_use_id,
                                 tool_name,
-                                format_hook_message(pre_hook_result.messages(), &deny_message),
+                                format_hook_message(&messages, &deny_message),
                                 true,
                             )
                         } else {
-                            let plugin_pre_hook_result =
+                            let (mut output, mut is_error) =
-                                self.run_plugin_pre_tool_use(&tool_name, &input);
+                                match self.tool_executor.execute(&tool_name, &effective_input) {
-                            if plugin_pre_hook_result.is_denied() {
+                                    Ok(output) => (output, false),
-                                let deny_message =
+                                    Err(error) => (error.to_string(), true),
-                                    format!("PreToolUse hook denied tool `{tool_name}`");
+                                };
-                                let mut messages = pre_hook_result.messages().to_vec();
+                            output = merge_hook_feedback(pre_hook_result.messages(), output, false);
-                                messages.extend(plugin_pre_hook_result.messages().iter().cloned());
+                            output = merge_hook_feedback(
-                                ConversationMessage::tool_result(
+                                plugin_pre_hook_result.messages(),
-                                    tool_use_id,
+                                output,
-                                    tool_name,
+                                false,
-                                    format_hook_message(&messages, &deny_message),
+                            );
-                                    true,
+
+                            let hook_output = output.clone();
+                            let post_hook_result = if is_error {
+                                self.run_post_tool_use_failure_hook(
+                                    &tool_name,
+                                    &effective_input,
+                                    &hook_output,
                                 )
                             } else {
-                                let (mut output, mut is_error) =
+                                self.run_post_tool_use_hook(
-                                    match self.tool_executor.execute(&tool_name, &input) {
+                                    &tool_name,
-                                        Ok(output) => (output, false),
+                                    &effective_input,
-                                        Err(error) => (error.to_string(), true),
+                                    &hook_output,
-                                    };
-                                output =
-                                    merge_hook_feedback(pre_hook_result.messages(), output, false);
-                                output = merge_hook_feedback(
-                                    plugin_pre_hook_result.messages(),
-                                    output,
                                     false,
-                                );
-
-                                let hook_output = output.clone();
-                                let post_hook_result = self.hook_runner.run_post_tool_use(
-                                    &tool_name,
-                                    &input,
-                                    &hook_output,
-                                    is_error,
-                                );
-                                let plugin_post_hook_result = self.run_plugin_post_tool_use(
-                                    &tool_name,
-                                    &input,
-                                    &hook_output,
-                                    is_error,
-                                );
-                                if post_hook_result.is_denied() {
-                                    is_error = true;
-                                }
-                                if plugin_post_hook_result.is_denied() {
-                                    is_error = true;
-                                }
-                                output = merge_hook_feedback(
-                                    post_hook_result.messages(),
-                                    output,
-                                    post_hook_result.is_denied(),
-                                );
-                                output = merge_hook_feedback(
-                                    plugin_post_hook_result.messages(),
-                                    output,
-                                    plugin_post_hook_result.is_denied(),
-                                );
-
-                                ConversationMessage::tool_result(
-                                    tool_use_id,
-                                    tool_name,
-                                    output,
-                                    is_error,
                                 )
+                            };
+                            let plugin_post_hook_result = self.run_plugin_post_tool_use(
+                                &tool_name,
+                                &effective_input,
+                                &hook_output,
+                                is_error,
+                            );
+                            if post_hook_result.is_denied()
+                                || post_hook_result.is_cancelled()
+                                || plugin_post_hook_result.is_denied()
+                            {
+                                is_error = true;
                             }
+                            output = merge_hook_feedback(
+                                post_hook_result.messages(),
+                                output,
+                                post_hook_result.is_denied() || post_hook_result.is_cancelled(),
+                            );
+                            output = merge_hook_feedback(
+                                plugin_post_hook_result.messages(),
+                                output,
+                                plugin_post_hook_result.is_denied(),
+                            );
+
+                            ConversationMessage::tool_result(
+                                tool_use_id,
+                                tool_name,
+                                output,
+                                is_error,
+                            )
                         }
                     }
-                    PermissionOutcome::Deny { reason } => {
+                    PermissionOutcome::Deny { reason } => ConversationMessage::tool_result(
-                        ConversationMessage::tool_result(tool_use_id, tool_name, reason, true)
+                        tool_use_id,
-                    }
+                        tool_name,
+                        merge_hook_feedback(pre_hook_result.messages(), reason, true),
+                        true,
+                    ),
                 };
                 self.session.messages.push(result_message.clone());
                 tool_results.push(result_message);
@@ -870,6 +992,7 @@ mod tests {
             RuntimeFeatureConfig::default().with_hooks(RuntimeHookConfig::new(
                 vec![shell_snippet("printf 'blocked by hook'; exit 2")],
                 Vec::new(),
+                Vec::new(),
             )),
         );
 
@@ -936,6 +1059,7 @@ mod tests {
             RuntimeFeatureConfig::default().with_hooks(RuntimeHookConfig::new(
                 vec![shell_snippet("printf 'pre hook ran'")],
                 vec![shell_snippet("printf 'post hook ran'")],
+                Vec::new(),
             )),
         );
 

rust/crates/runtime/src/hooks.rs

@@ -1,30 +1,91 @@
 use std::ffi::OsStr;
+use std::io::Write;
 use std::path::Path;
-use std::process::Command;
+use std::process::{Command, Stdio};
+use std::sync::{
+    atomic::{AtomicBool, Ordering},
+    Arc,
+};
+use std::thread;
+use std::time::Duration;
 
-use serde_json::json;
+use serde_json::{json, Value};
 
 use crate::config::{RuntimeFeatureConfig, RuntimeHookConfig};
+use crate::permissions::PermissionOverride;
+
+pub type HookPermissionDecision = PermissionOverride;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum HookEvent {
     PreToolUse,
     PostToolUse,
+    PostToolUseFailure,
 }
 
 impl HookEvent {
-    fn as_str(self) -> &'static str {
+    #[must_use]
+    pub fn as_str(self) -> &'static str {
         match self {
             Self::PreToolUse => "PreToolUse",
             Self::PostToolUse => "PostToolUse",
+            Self::PostToolUseFailure => "PostToolUseFailure",
         }
     }
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum HookProgressEvent {
+    Started {
+        event: HookEvent,
+        tool_name: String,
+        command: String,
+    },
+    Completed {
+        event: HookEvent,
+        tool_name: String,
+        command: String,
+    },
+    Cancelled {
+        event: HookEvent,
+        tool_name: String,
+        command: String,
+    },
+}
+
+pub trait HookProgressReporter {
+    fn on_event(&mut self, event: &HookProgressEvent);
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct HookAbortSignal {
+    aborted: Arc<AtomicBool>,
+}
+
+impl HookAbortSignal {
+    #[must_use]
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn abort(&self) {
+        self.aborted.store(true, Ordering::SeqCst);
+    }
+
+    #[must_use]
+    pub fn is_aborted(&self) -> bool {
+        self.aborted.load(Ordering::SeqCst)
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct HookRunResult {
     denied: bool,
+    cancelled: bool,
     messages: Vec<String>,
+    permission_override: Option<PermissionOverride>,
+    permission_reason: Option<String>,
+    updated_input: Option<String>,
 }
 
 impl HookRunResult {
@@ -32,7 +93,11 @@ impl HookRunResult {
     pub fn allow(messages: Vec<String>) -> Self {
         Self {
             denied: false,
+            cancelled: false,
             messages,
+            permission_override: None,
+            permission_reason: None,
+            updated_input: None,
         }
     }
 
@@ -41,10 +106,40 @@ impl HookRunResult {
         self.denied
     }
 
+    #[must_use]
+    pub fn is_cancelled(&self) -> bool {
+        self.cancelled
+    }
+
     #[must_use]
     pub fn messages(&self) -> &[String] {
         &self.messages
     }
+
+    #[must_use]
+    pub fn permission_override(&self) -> Option<PermissionOverride> {
+        self.permission_override
+    }
+
+    #[must_use]
+    pub fn permission_decision(&self) -> Option<HookPermissionDecision> {
+        self.permission_override
+    }
+
+    #[must_use]
+    pub fn permission_reason(&self) -> Option<&str> {
+        self.permission_reason.as_deref()
+    }
+
+    #[must_use]
+    pub fn updated_input(&self) -> Option<&str> {
+        self.updated_input.as_deref()
+    }
+
+    #[must_use]
+    pub fn updated_input_json(&self) -> Option<&str> {
+        self.updated_input()
+    }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Default)]
@@ -65,16 +160,39 @@ impl HookRunner {
 
     #[must_use]
     pub fn run_pre_tool_use(&self, tool_name: &str, tool_input: &str) -> HookRunResult {
-        self.run_commands(
+        self.run_pre_tool_use_with_context(tool_name, tool_input, None, None)
+    }
+
+    #[must_use]
+    pub fn run_pre_tool_use_with_context(
+        &self,
+        tool_name: &str,
+        tool_input: &str,
+        abort_signal: Option<&HookAbortSignal>,
+        reporter: Option<&mut dyn HookProgressReporter>,
+    ) -> HookRunResult {
+        Self::run_commands(
             HookEvent::PreToolUse,
             self.config.pre_tool_use(),
             tool_name,
             tool_input,
             None,
             false,
+            abort_signal,
+            reporter,
         )
     }
 
+    #[must_use]
+    pub fn run_pre_tool_use_with_signal(
+        &self,
+        tool_name: &str,
+        tool_input: &str,
+        abort_signal: Option<&HookAbortSignal>,
+    ) -> HookRunResult {
+        self.run_pre_tool_use_with_context(tool_name, tool_input, abort_signal, None)
+    }
+
     #[must_use]
     pub fn run_post_tool_use(
         &self,
@@ -83,43 +201,147 @@ impl HookRunner {
         tool_output: &str,
         is_error: bool,
     ) -> HookRunResult {
-        self.run_commands(
+        self.run_post_tool_use_with_context(
+            tool_name,
+            tool_input,
+            tool_output,
+            is_error,
+            None,
+            None,
+        )
+    }
+
+    #[must_use]
+    pub fn run_post_tool_use_with_context(
+        &self,
+        tool_name: &str,
+        tool_input: &str,
+        tool_output: &str,
+        is_error: bool,
+        abort_signal: Option<&HookAbortSignal>,
+        reporter: Option<&mut dyn HookProgressReporter>,
+    ) -> HookRunResult {
+        Self::run_commands(
             HookEvent::PostToolUse,
             self.config.post_tool_use(),
             tool_name,
             tool_input,
             Some(tool_output),
             is_error,
+            abort_signal,
+            reporter,
         )
     }
 
-    fn run_commands(
+    #[must_use]
+    pub fn run_post_tool_use_with_signal(
         &self,
+        tool_name: &str,
+        tool_input: &str,
+        tool_output: &str,
+        is_error: bool,
+        abort_signal: Option<&HookAbortSignal>,
+    ) -> HookRunResult {
+        self.run_post_tool_use_with_context(
+            tool_name,
+            tool_input,
+            tool_output,
+            is_error,
+            abort_signal,
+            None,
+        )
+    }
+
+    #[must_use]
+    pub fn run_post_tool_use_failure(
+        &self,
+        tool_name: &str,
+        tool_input: &str,
+        tool_error: &str,
+    ) -> HookRunResult {
+        self.run_post_tool_use_failure_with_context(tool_name, tool_input, tool_error, None, None)
+    }
+
+    #[must_use]
+    pub fn run_post_tool_use_failure_with_context(
+        &self,
+        tool_name: &str,
+        tool_input: &str,
+        tool_error: &str,
+        abort_signal: Option<&HookAbortSignal>,
+        reporter: Option<&mut dyn HookProgressReporter>,
+    ) -> HookRunResult {
+        Self::run_commands(
+            HookEvent::PostToolUseFailure,
+            self.config.post_tool_use_failure(),
+            tool_name,
+            tool_input,
+            Some(tool_error),
+            true,
+            abort_signal,
+            reporter,
+        )
+    }
+
+    #[must_use]
+    pub fn run_post_tool_use_failure_with_signal(
+        &self,
+        tool_name: &str,
+        tool_input: &str,
+        tool_error: &str,
+        abort_signal: Option<&HookAbortSignal>,
+    ) -> HookRunResult {
+        self.run_post_tool_use_failure_with_context(
+            tool_name,
+            tool_input,
+            tool_error,
+            abort_signal,
+            None,
+        )
+    }
+
+    #[allow(clippy::too_many_arguments)]
+    fn run_commands(
         event: HookEvent,
         commands: &[String],
         tool_name: &str,
         tool_input: &str,
         tool_output: Option<&str>,
         is_error: bool,
+        abort_signal: Option<&HookAbortSignal>,
+        mut reporter: Option<&mut dyn HookProgressReporter>,
     ) -> HookRunResult {
         if commands.is_empty() {
             return HookRunResult::allow(Vec::new());
         }
 
-        let payload = json!({
+        if abort_signal.is_some_and(HookAbortSignal::is_aborted) {
-            "hook_event_name": event.as_str(),
+            return HookRunResult {
-            "tool_name": tool_name,
+                denied: false,
-            "tool_input": parse_tool_input(tool_input),
+                cancelled: true,
-            "tool_input_json": tool_input,
+                messages: vec![format!(
-            "tool_output": tool_output,
+                    "{} hook cancelled before execution",
-            "tool_result_is_error": is_error,
+                    event.as_str()
-        })
+                )],
-        .to_string();
+                permission_override: None,
+                permission_reason: None,
+                updated_input: None,
+            };
+        }
 
-        let mut messages = Vec::new();
+        let payload = hook_payload(event, tool_name, tool_input, tool_output, is_error).to_string();
+        let mut result = HookRunResult::allow(Vec::new());
 
         for command in commands {
-            match self.run_command(
+            if let Some(reporter) = reporter.as_deref_mut() {
+                reporter.on_event(&HookProgressEvent::Started {
+                    event,
+                    tool_name: tool_name.to_string(),
+                    command: command.clone(),
+                });
+            }
+
+            match Self::run_command(
                 command,
                 event,
                 tool_name,
@@ -127,32 +349,60 @@ impl HookRunner {
                 tool_output,
                 is_error,
                 &payload,
+                abort_signal,
             ) {
-                HookCommandOutcome::Allow { message } => {
+                HookCommandOutcome::Allow { parsed } => {
-                    if let Some(message) = message {
+                    if let Some(reporter) = reporter.as_deref_mut() {
-                        messages.push(message);
+                        reporter.on_event(&HookProgressEvent::Completed {
+                            event,
+                            tool_name: tool_name.to_string(),
+                            command: command.clone(),
+                        });
                     }
+                    merge_parsed_hook_output(&mut result, parsed);
                 }
-                HookCommandOutcome::Deny { message } => {
+                HookCommandOutcome::Deny { parsed } => {
-                    let message = message.unwrap_or_else(|| {
+                    if let Some(reporter) = reporter.as_deref_mut() {
-                        format!("{} hook denied tool `{tool_name}`", event.as_str())
+                        reporter.on_event(&HookProgressEvent::Completed {
-                    });
+                            event,
-                    messages.push(message);
+                            tool_name: tool_name.to_string(),
-                    return HookRunResult {
+                            command: command.clone(),
-                        denied: true,
+                        });
-                        messages,
+                    }
-                    };
+                    merge_parsed_hook_output(&mut result, parsed);
+                    result.denied = true;
+                    return result;
+                }
+                HookCommandOutcome::Warn { message } => {
+                    if let Some(reporter) = reporter.as_deref_mut() {
+                        reporter.on_event(&HookProgressEvent::Completed {
+                            event,
+                            tool_name: tool_name.to_string(),
+                            command: command.clone(),
+                        });
+                    }
+                    result.messages.push(message);
+                }
+                HookCommandOutcome::Cancelled { message } => {
+                    if let Some(reporter) = reporter.as_deref_mut() {
+                        reporter.on_event(&HookProgressEvent::Cancelled {
+                            event,
+                            tool_name: tool_name.to_string(),
+                            command: command.clone(),
+                        });
+                    }
+                    result.cancelled = true;
+                    result.messages.push(message);
+                    return result;
                 }
-                HookCommandOutcome::Warn { message } => messages.push(message),
             }
         }
 
-        HookRunResult::allow(messages)
+        result
     }
 
-    #[allow(clippy::too_many_arguments, clippy::unused_self)]
+    #[allow(clippy::too_many_arguments)]
     fn run_command(
-        &self,
         command: &str,
         event: HookEvent,
         tool_name: &str,
@@ -160,11 +410,12 @@ impl HookRunner {
         tool_output: Option<&str>,
         is_error: bool,
         payload: &str,
+        abort_signal: Option<&HookAbortSignal>,
     ) -> HookCommandOutcome {
         let mut child = shell_command(command);
-        child.stdin(std::process::Stdio::piped());
+        child.stdin(Stdio::piped());
-        child.stdout(std::process::Stdio::piped());
+        child.stdout(Stdio::piped());
-        child.stderr(std::process::Stdio::piped());
+        child.stderr(Stdio::piped());
         child.env("HOOK_EVENT", event.as_str());
         child.env("HOOK_TOOL_NAME", tool_name);
         child.env("HOOK_TOOL_INPUT", tool_input);
@@ -173,19 +424,30 @@ impl HookRunner {
             child.env("HOOK_TOOL_OUTPUT", tool_output);
         }
 
-        match child.output_with_stdin(payload.as_bytes()) {
+        match child.output_with_stdin(payload.as_bytes(), abort_signal) {
-            Ok(output) => {
+            Ok(CommandExecution::Finished(output)) => {
                 let stdout = String::from_utf8_lossy(&output.stdout).trim().to_string();
                 let stderr = String::from_utf8_lossy(&output.stderr).trim().to_string();
-                let message = (!stdout.is_empty()).then_some(stdout);
+                let parsed = parse_hook_output(&stdout);
                 match output.status.code() {
-                    Some(0) => HookCommandOutcome::Allow { message },
+                    Some(0) => {
-                    Some(2) => HookCommandOutcome::Deny { message },
+                        if parsed.deny {
+                            HookCommandOutcome::Deny { parsed }
+                        } else {
+                            HookCommandOutcome::Allow { parsed }
+                        }
+                    }
+                    Some(2) => HookCommandOutcome::Deny {
+                        parsed: parsed.with_fallback_message(format!(
+                            "{} hook denied tool `{tool_name}`",
+                            event.as_str()
+                        )),
+                    },
                     Some(code) => HookCommandOutcome::Warn {
                         message: format_hook_warning(
                             command,
                             code,
-                            message.as_deref(),
+                            parsed.primary_message(),
                             stderr.as_str(),
                         ),
                     },
@@ -197,6 +459,12 @@ impl HookRunner {
                     },
                 }
             }
+            Ok(CommandExecution::Cancelled) => HookCommandOutcome::Cancelled {
+                message: format!(
+                    "{} hook `{command}` cancelled while handling `{tool_name}`",
+                    event.as_str()
+                ),
+            },
             Err(error) => HookCommandOutcome::Warn {
                 message: format!(
                     "{} hook `{command}` failed to start for `{tool_name}`: {error}",
@@ -208,12 +476,131 @@ impl HookRunner {
 }
 
 enum HookCommandOutcome {
-    Allow { message: Option<String> },
+    Allow { parsed: ParsedHookOutput },
-    Deny { message: Option<String> },
+    Deny { parsed: ParsedHookOutput },
     Warn { message: String },
+    Cancelled { message: String },
 }
 
-fn parse_tool_input(tool_input: &str) -> serde_json::Value {
+#[derive(Debug, Clone, PartialEq, Eq, Default)]
+struct ParsedHookOutput {
+    messages: Vec<String>,
+    deny: bool,
+    permission_override: Option<PermissionOverride>,
+    permission_reason: Option<String>,
+    updated_input: Option<String>,
+}
+
+impl ParsedHookOutput {
+    fn with_fallback_message(mut self, fallback: String) -> Self {
+        if self.messages.is_empty() {
+            self.messages.push(fallback);
+        }
+        self
+    }
+
+    fn primary_message(&self) -> Option<&str> {
+        self.messages.first().map(String::as_str)
+    }
+}
+
+fn merge_parsed_hook_output(target: &mut HookRunResult, parsed: ParsedHookOutput) {
+    target.messages.extend(parsed.messages);
+    if parsed.permission_override.is_some() {
+        target.permission_override = parsed.permission_override;
+    }
+    if parsed.permission_reason.is_some() {
+        target.permission_reason = parsed.permission_reason;
+    }
+    if parsed.updated_input.is_some() {
+        target.updated_input = parsed.updated_input;
+    }
+}
+
+fn parse_hook_output(stdout: &str) -> ParsedHookOutput {
+    if stdout.is_empty() {
+        return ParsedHookOutput::default();
+    }
+
+    let Ok(Value::Object(root)) = serde_json::from_str::<Value>(stdout) else {
+        return ParsedHookOutput {
+            messages: vec![stdout.to_string()],
+            ..ParsedHookOutput::default()
+        };
+    };
+
+    let mut parsed = ParsedHookOutput::default();
+
+    if let Some(message) = root.get("systemMessage").and_then(Value::as_str) {
+        parsed.messages.push(message.to_string());
+    }
+    if let Some(message) = root.get("reason").and_then(Value::as_str) {
+        parsed.messages.push(message.to_string());
+    }
+    if root.get("continue").and_then(Value::as_bool) == Some(false)
+        || root.get("decision").and_then(Value::as_str) == Some("block")
+    {
+        parsed.deny = true;
+    }
+
+    if let Some(Value::Object(specific)) = root.get("hookSpecificOutput") {
+        if let Some(Value::String(additional_context)) = specific.get("additionalContext") {
+            parsed.messages.push(additional_context.clone());
+        }
+        if let Some(decision) = specific.get("permissionDecision").and_then(Value::as_str) {
+            parsed.permission_override = match decision {
+                "allow" => Some(PermissionOverride::Allow),
+                "deny" => Some(PermissionOverride::Deny),
+                "ask" => Some(PermissionOverride::Ask),
+                _ => None,
+            };
+        }
+        if let Some(reason) = specific
+            .get("permissionDecisionReason")
+            .and_then(Value::as_str)
+        {
+            parsed.permission_reason = Some(reason.to_string());
+        }
+        if let Some(updated_input) = specific.get("updatedInput") {
+            parsed.updated_input = serde_json::to_string(updated_input).ok();
+        }
+    }
+
+    if parsed.messages.is_empty() {
+        parsed.messages.push(stdout.to_string());
+    }
+
+    parsed
+}
+
+fn hook_payload(
+    event: HookEvent,
+    tool_name: &str,
+    tool_input: &str,
+    tool_output: Option<&str>,
+    is_error: bool,
+) -> Value {
+    match event {
+        HookEvent::PostToolUseFailure => json!({
+            "hook_event_name": event.as_str(),
+            "tool_name": tool_name,
+            "tool_input": parse_tool_input(tool_input),
+            "tool_input_json": tool_input,
+            "tool_error": tool_output,
+            "tool_result_is_error": true,
+        }),
+        _ => json!({
+            "hook_event_name": event.as_str(),
+            "tool_name": tool_name,
+            "tool_input": parse_tool_input(tool_input),
+            "tool_input_json": tool_input,
+            "tool_output": tool_output,
+            "tool_result_is_error": is_error,
+        }),
+    }
+}
+
+fn parse_tool_input(tool_input: &str) -> Value {
     serde_json::from_str(tool_input).unwrap_or_else(|_| json!({ "raw": tool_input }))
 }
 
@@ -261,17 +648,17 @@ impl CommandWithStdin {
         Self { command }
     }
 
-    fn stdin(&mut self, cfg: std::process::Stdio) -> &mut Self {
+    fn stdin(&mut self, cfg: Stdio) -> &mut Self {
         self.command.stdin(cfg);
         self
     }
 
-    fn stdout(&mut self, cfg: std::process::Stdio) -> &mut Self {
+    fn stdout(&mut self, cfg: Stdio) -> &mut Self {
         self.command.stdout(cfg);
         self
     }
 
-    fn stderr(&mut self, cfg: std::process::Stdio) -> &mut Self {
+    fn stderr(&mut self, cfg: Stdio) -> &mut Self {
         self.command.stderr(cfg);
         self
     }
@@ -285,26 +672,64 @@ impl CommandWithStdin {
         self
     }
 
-    fn output_with_stdin(&mut self, stdin: &[u8]) -> std::io::Result<std::process::Output> {
+    fn output_with_stdin(
+        &mut self,
+        stdin: &[u8],
+        abort_signal: Option<&HookAbortSignal>,
+    ) -> std::io::Result<CommandExecution> {
         let mut child = self.command.spawn()?;
         if let Some(mut child_stdin) = child.stdin.take() {
-            use std::io::Write;
             child_stdin.write_all(stdin)?;
         }
-        child.wait_with_output()
+
+        loop {
+            if abort_signal.is_some_and(HookAbortSignal::is_aborted) {
+                let _ = child.kill();
+                let _ = child.wait_with_output();
+                return Ok(CommandExecution::Cancelled);
+            }
+
+            match child.try_wait()? {
+                Some(_) => return child.wait_with_output().map(CommandExecution::Finished),
+                None => thread::sleep(Duration::from_millis(20)),
+            }
+        }
     }
 }
 
+enum CommandExecution {
+    Finished(std::process::Output),
+    Cancelled,
+}
+
 #[cfg(test)]
 mod tests {
-    use super::{HookRunResult, HookRunner};
+    use std::thread;
+    use std::time::Duration;
+
+    use super::{
+        HookAbortSignal, HookEvent, HookProgressEvent, HookProgressReporter, HookRunResult,
+        HookRunner,
+    };
     use crate::config::{RuntimeFeatureConfig, RuntimeHookConfig};
+    use crate::permissions::PermissionOverride;
+
+    struct RecordingReporter {
+        events: Vec<HookProgressEvent>,
+    }
+
+    impl HookProgressReporter for RecordingReporter {
+        fn on_event(&mut self, event: &HookProgressEvent) {
+            self.events.push(event.clone());
+        }
+    }
 
     #[test]
     fn allows_exit_code_zero_and_captures_stdout() {
         let runner = HookRunner::new(RuntimeHookConfig::new(
             vec![shell_snippet("printf 'pre ok'")],
             Vec::new(),
+            Vec::new(),
         ));
 
         let result = runner.run_pre_tool_use("Read", r#"{"path":"README.md"}"#);
@@ -317,6 +742,7 @@ mod tests {
         let runner = HookRunner::new(RuntimeHookConfig::new(
             vec![shell_snippet("printf 'blocked by hook'; exit 2")],
             Vec::new(),
+            Vec::new(),
         ));
 
         let result = runner.run_pre_tool_use("Bash", r#"{"command":"pwd"}"#);
@@ -331,6 +757,7 @@ mod tests {
             RuntimeHookConfig::new(
                 vec![shell_snippet("printf 'warning hook'; exit 1")],
                 Vec::new(),
+                Vec::new(),
             ),
         ));
 
@@ -343,6 +770,82 @@ mod tests {
             .any(|message| message.contains("allowing tool execution to continue")));
     }
 
+    #[test]
+    fn parses_pre_hook_permission_override_and_updated_input() {
+        let runner = HookRunner::new(RuntimeHookConfig::new(
+            vec![shell_snippet(
+                r#"printf '%s' '{"systemMessage":"updated","hookSpecificOutput":{"permissionDecision":"allow","permissionDecisionReason":"hook ok","updatedInput":{"command":"git status"}}}'"#,
+            )],
+            Vec::new(),
+            Vec::new(),
+        ));
+
+        let result = runner.run_pre_tool_use("bash", r#"{"command":"pwd"}"#);
+
+        assert_eq!(
+            result.permission_override(),
+            Some(PermissionOverride::Allow)
+        );
+        assert_eq!(result.permission_reason(), Some("hook ok"));
+        assert_eq!(result.updated_input(), Some(r#"{"command":"git status"}"#));
+        assert!(result.messages().iter().any(|message| message == "updated"));
+    }
+
+    #[test]
+    fn runs_post_tool_use_failure_hooks() {
+        let runner = HookRunner::new(RuntimeHookConfig::new(
+            Vec::new(),
+            Vec::new(),
+            vec![shell_snippet("printf 'failure hook ran'")],
+        ));
+
+        let result =
+            runner.run_post_tool_use_failure("bash", r#"{"command":"false"}"#, "command failed");
+
+        assert!(!result.is_denied());
+        assert_eq!(result.messages(), &["failure hook ran".to_string()]);
+    }
+
+    #[test]
+    fn abort_signal_cancels_long_running_hook_and_reports_progress() {
+        let runner = HookRunner::new(RuntimeHookConfig::new(
+            vec![shell_snippet("sleep 5")],
+            Vec::new(),
+            Vec::new(),
+        ));
+        let abort_signal = HookAbortSignal::new();
+        let abort_signal_for_thread = abort_signal.clone();
+        let mut reporter = RecordingReporter { events: Vec::new() };
+
+        thread::spawn(move || {
+            thread::sleep(Duration::from_millis(100));
+            abort_signal_for_thread.abort();
+        });
+
+        let result = runner.run_pre_tool_use_with_context(
+            "bash",
+            r#"{"command":"sleep 5"}"#,
+            Some(&abort_signal),
+            Some(&mut reporter),
+        );
+
+        assert!(result.is_cancelled());
+        assert!(reporter.events.iter().any(|event| matches!(
+            event,
+            HookProgressEvent::Started {
+                event: HookEvent::PreToolUse,
+                ..
+            }
+        )));
+        assert!(reporter.events.iter().any(|event| matches!(
+            event,
+            HookProgressEvent::Cancelled {
+                event: HookEvent::PreToolUse,
+                ..
+            }
+        )));
+    }
+
     #[cfg(windows)]
     fn shell_snippet(script: &str) -> String {
         script.replace('\'', "\"")

rust/crates/runtime/src/lib.rs

@@ -28,7 +28,8 @@ pub use config::{
     McpConfigCollection, McpOAuthConfig, McpRemoteServerConfig, McpSdkServerConfig,
     McpServerConfig, McpStdioServerConfig, McpTransport, McpWebSocketServerConfig, OAuthConfig,
     ResolvedPermissionMode, RuntimeConfig, RuntimeFeatureConfig, RuntimeHookConfig,
-    RuntimePluginConfig, ScopedMcpServerConfig, CLAUDE_CODE_SETTINGS_SCHEMA_NAME,
+    RuntimePermissionRuleConfig, RuntimePluginConfig, ScopedMcpServerConfig,
+    CLAUDE_CODE_SETTINGS_SCHEMA_NAME,
 };
 pub use conversation::{
     auto_compaction_threshold_from_env, ApiClient, ApiRequest, AssistantEvent, AutoCompactionEvent,
@@ -39,7 +40,9 @@ pub use file_ops::{
     GrepSearchInput, GrepSearchOutput, ReadFileOutput, StructuredPatchHunk, TextFilePayload,
     WriteFileOutput,
 };
-pub use hooks::{HookEvent, HookRunResult, HookRunner};
+pub use hooks::{
+    HookAbortSignal, HookEvent, HookProgressEvent, HookProgressReporter, HookRunResult, HookRunner,
+};
 pub use mcp::{
     mcp_server_signature, mcp_tool_name, mcp_tool_prefix, normalize_name_for_mcp,
     scoped_mcp_config_hash, unwrap_ccr_proxy_url,
@@ -64,8 +67,8 @@ pub use oauth::{
     PkceChallengeMethod, PkceCodePair,
 };
 pub use permissions::{
-    PermissionMode, PermissionOutcome, PermissionPolicy, PermissionPromptDecision,
+    PermissionContext, PermissionMode, PermissionOutcome, PermissionOverride, PermissionPolicy,
-    PermissionPrompter, PermissionRequest,
+    PermissionPromptDecision, PermissionPrompter, PermissionRequest,
 };
 pub use prompt::{
     load_system_prompt, prepend_bullets, ContextFile, ProjectContext, PromptBuildError,

rust/crates/runtime/src/permissions.rs

@@ -1,5 +1,9 @@
 use std::collections::BTreeMap;
 
+use serde_json::Value;
+
+use crate::config::RuntimePermissionRuleConfig;
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
 pub enum PermissionMode {
     ReadOnly,
@@ -22,12 +26,49 @@ impl PermissionMode {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum PermissionOverride {
+    Allow,
+    Deny,
+    Ask,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Default)]
+pub struct PermissionContext {
+    override_decision: Option<PermissionOverride>,
+    override_reason: Option<String>,
+}
+
+impl PermissionContext {
+    #[must_use]
+    pub fn new(
+        override_decision: Option<PermissionOverride>,
+        override_reason: Option<String>,
+    ) -> Self {
+        Self {
+            override_decision,
+            override_reason,
+        }
+    }
+
+    #[must_use]
+    pub fn override_decision(&self) -> Option<PermissionOverride> {
+        self.override_decision
+    }
+
+    #[must_use]
+    pub fn override_reason(&self) -> Option<&str> {
+        self.override_reason.as_deref()
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct PermissionRequest {
     pub tool_name: String,
     pub input: String,
     pub current_mode: PermissionMode,
     pub required_mode: PermissionMode,
+    pub reason: Option<String>,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -50,6 +91,9 @@ pub enum PermissionOutcome {
 pub struct PermissionPolicy {
     active_mode: PermissionMode,
     tool_requirements: BTreeMap<String, PermissionMode>,
+    allow_rules: Vec<PermissionRule>,
+    deny_rules: Vec<PermissionRule>,
+    ask_rules: Vec<PermissionRule>,
 }
 
 impl PermissionPolicy {
@@ -58,6 +102,9 @@ impl PermissionPolicy {
         Self {
             active_mode,
             tool_requirements: BTreeMap::new(),
+            allow_rules: Vec::new(),
+            deny_rules: Vec::new(),
+            ask_rules: Vec::new(),
         }
     }
 
@@ -72,6 +119,26 @@ impl PermissionPolicy {
         self
     }
 
+    #[must_use]
+    pub fn with_permission_rules(mut self, config: &RuntimePermissionRuleConfig) -> Self {
+        self.allow_rules = config
+            .allow()
+            .iter()
+            .map(|rule| PermissionRule::parse(rule))
+            .collect();
+        self.deny_rules = config
+            .deny()
+            .iter()
+            .map(|rule| PermissionRule::parse(rule))
+            .collect();
+        self.ask_rules = config
+            .ask()
+            .iter()
+            .map(|rule| PermissionRule::parse(rule))
+            .collect();
+        self
+    }
+
     #[must_use]
     pub fn active_mode(&self) -> PermissionMode {
         self.active_mode
@@ -90,38 +157,121 @@ impl PermissionPolicy {
         &self,
         tool_name: &str,
         input: &str,
-        mut prompter: Option<&mut dyn PermissionPrompter>,
+        prompter: Option<&mut dyn PermissionPrompter>,
     ) -> PermissionOutcome {
-        let current_mode = self.active_mode();
+        self.authorize_with_context(tool_name, input, &PermissionContext::default(), prompter)
-        let required_mode = self.required_mode_for(tool_name);
+    }
-        if current_mode == PermissionMode::Allow || current_mode >= required_mode {
+
-            return PermissionOutcome::Allow;
+    #[must_use]
+    #[allow(clippy::too_many_lines)]
+    pub fn authorize_with_context(
+        &self,
+        tool_name: &str,
+        input: &str,
+        context: &PermissionContext,
+        prompter: Option<&mut dyn PermissionPrompter>,
+    ) -> PermissionOutcome {
+        if let Some(rule) = Self::find_matching_rule(&self.deny_rules, tool_name, input) {
+            return PermissionOutcome::Deny {
+                reason: format!(
+                    "Permission to use {tool_name} has been denied by rule '{}'",
+                    rule.raw
+                ),
+            };
         }
 
-        let request = PermissionRequest {
+        let current_mode = self.active_mode();
-            tool_name: tool_name.to_string(),
+        let required_mode = self.required_mode_for(tool_name);
-            input: input.to_string(),
+        let ask_rule = Self::find_matching_rule(&self.ask_rules, tool_name, input);
-            current_mode,
+        let allow_rule = Self::find_matching_rule(&self.allow_rules, tool_name, input);
-            required_mode,
+
-        };
+        match context.override_decision() {
+            Some(PermissionOverride::Deny) => {
+                return PermissionOutcome::Deny {
+                    reason: context.override_reason().map_or_else(
+                        || format!("tool '{tool_name}' denied by hook"),
+                        ToOwned::to_owned,
+                    ),
+                };
+            }
+            Some(PermissionOverride::Ask) => {
+                let reason = context.override_reason().map_or_else(
+                    || format!("tool '{tool_name}' requires approval due to hook guidance"),
+                    ToOwned::to_owned,
+                );
+                return Self::prompt_or_deny(
+                    tool_name,
+                    input,
+                    current_mode,
+                    required_mode,
+                    Some(reason),
+                    prompter,
+                );
+            }
+            Some(PermissionOverride::Allow) => {
+                if let Some(rule) = ask_rule {
+                    let reason = format!(
+                        "tool '{tool_name}' requires approval due to ask rule '{}'",
+                        rule.raw
+                    );
+                    return Self::prompt_or_deny(
+                        tool_name,
+                        input,
+                        current_mode,
+                        required_mode,
+                        Some(reason),
+                        prompter,
+                    );
+                }
+                if allow_rule.is_some()
+                    || current_mode == PermissionMode::Allow
+                    || current_mode >= required_mode
+                {
+                    return PermissionOutcome::Allow;
+                }
+            }
+            None => {}
+        }
+
+        if let Some(rule) = ask_rule {
+            let reason = format!(
+                "tool '{tool_name}' requires approval due to ask rule '{}'",
+                rule.raw
+            );
+            return Self::prompt_or_deny(
+                tool_name,
+                input,
+                current_mode,
+                required_mode,
+                Some(reason),
+                prompter,
+            );
+        }
+
+        if allow_rule.is_some()
+            || current_mode == PermissionMode::Allow
+            || current_mode >= required_mode
+        {
+            return PermissionOutcome::Allow;
+        }
 
         if current_mode == PermissionMode::Prompt
             || (current_mode == PermissionMode::WorkspaceWrite
                 && required_mode == PermissionMode::DangerFullAccess)
         {
-            return match prompter.as_mut() {
+            let reason = Some(format!(
-                Some(prompter) => match prompter.decide(&request) {
+                "tool '{tool_name}' requires approval to escalate from {} to {}",
-                    PermissionPromptDecision::Allow => PermissionOutcome::Allow,
+                current_mode.as_str(),
-                    PermissionPromptDecision::Deny { reason } => PermissionOutcome::Deny { reason },
+                required_mode.as_str()
-                },
+            ));
-                None => PermissionOutcome::Deny {
+            return Self::prompt_or_deny(
-                    reason: format!(
+                tool_name,
-                        "tool '{tool_name}' requires approval to escalate from {} to {}",
+                input,
-                        current_mode.as_str(),
+                current_mode,
-                        required_mode.as_str()
+                required_mode,
-                    ),
+                reason,
-                },
+                prompter,
-            };
+            );
         }
 
         PermissionOutcome::Deny {
@@ -132,14 +282,191 @@ impl PermissionPolicy {
             ),
         }
     }
+
+    fn prompt_or_deny(
+        tool_name: &str,
+        input: &str,
+        current_mode: PermissionMode,
+        required_mode: PermissionMode,
+        reason: Option<String>,
+        mut prompter: Option<&mut dyn PermissionPrompter>,
+    ) -> PermissionOutcome {
+        let request = PermissionRequest {
+            tool_name: tool_name.to_string(),
+            input: input.to_string(),
+            current_mode,
+            required_mode,
+            reason: reason.clone(),
+        };
+
+        match prompter.as_mut() {
+            Some(prompter) => match prompter.decide(&request) {
+                PermissionPromptDecision::Allow => PermissionOutcome::Allow,
+                PermissionPromptDecision::Deny { reason } => PermissionOutcome::Deny { reason },
+            },
+            None => PermissionOutcome::Deny {
+                reason: reason.unwrap_or_else(|| {
+                    format!(
+                        "tool '{tool_name}' requires approval to run while mode is {}",
+                        current_mode.as_str()
+                    )
+                }),
+            },
+        }
+    }
+
+    fn find_matching_rule<'a>(
+        rules: &'a [PermissionRule],
+        tool_name: &str,
+        input: &str,
+    ) -> Option<&'a PermissionRule> {
+        rules.iter().find(|rule| rule.matches(tool_name, input))
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+struct PermissionRule {
+    raw: String,
+    tool_name: String,
+    matcher: PermissionRuleMatcher,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+enum PermissionRuleMatcher {
+    Any,
+    Exact(String),
+    Prefix(String),
+}
+
+impl PermissionRule {
+    fn parse(raw: &str) -> Self {
+        let trimmed = raw.trim();
+        let open = find_first_unescaped(trimmed, '(');
+        let close = find_last_unescaped(trimmed, ')');
+
+        if let (Some(open), Some(close)) = (open, close) {
+            if close == trimmed.len() - 1 && open < close {
+                let tool_name = trimmed[..open].trim();
+                let content = &trimmed[open + 1..close];
+                if !tool_name.is_empty() {
+                    let matcher = parse_rule_matcher(content);
+                    return Self {
+                        raw: trimmed.to_string(),
+                        tool_name: tool_name.to_string(),
+                        matcher,
+                    };
+                }
+            }
+        }
+
+        Self {
+            raw: trimmed.to_string(),
+            tool_name: trimmed.to_string(),
+            matcher: PermissionRuleMatcher::Any,
+        }
+    }
+
+    fn matches(&self, tool_name: &str, input: &str) -> bool {
+        if self.tool_name != tool_name {
+            return false;
+        }
+
+        match &self.matcher {
+            PermissionRuleMatcher::Any => true,
+            PermissionRuleMatcher::Exact(expected) => {
+                extract_permission_subject(input).is_some_and(|candidate| candidate == *expected)
+            }
+            PermissionRuleMatcher::Prefix(prefix) => extract_permission_subject(input)
+                .is_some_and(|candidate| candidate.starts_with(prefix)),
+        }
+    }
+}
+
+fn parse_rule_matcher(content: &str) -> PermissionRuleMatcher {
+    let unescaped = unescape_rule_content(content.trim());
+    if unescaped.is_empty() || unescaped == "*" {
+        PermissionRuleMatcher::Any
+    } else if let Some(prefix) = unescaped.strip_suffix(":*") {
+        PermissionRuleMatcher::Prefix(prefix.to_string())
+    } else {
+        PermissionRuleMatcher::Exact(unescaped)
+    }
+}
+
+fn unescape_rule_content(content: &str) -> String {
+    content
+        .replace(r"\(", "(")
+        .replace(r"\)", ")")
+        .replace(r"\\", r"\")
+}
+
+fn find_first_unescaped(value: &str, needle: char) -> Option<usize> {
+    let mut escaped = false;
+    for (idx, ch) in value.char_indices() {
+        if ch == '\\' {
+            escaped = !escaped;
+            continue;
+        }
+        if ch == needle && !escaped {
+            return Some(idx);
+        }
+        escaped = false;
+    }
+    None
+}
+
+fn find_last_unescaped(value: &str, needle: char) -> Option<usize> {
+    let chars = value.char_indices().collect::<Vec<_>>();
+    for (pos, (idx, ch)) in chars.iter().enumerate().rev() {
+        if *ch != needle {
+            continue;
+        }
+        let mut backslashes = 0;
+        for (_, prev) in chars[..pos].iter().rev() {
+            if *prev == '\\' {
+                backslashes += 1;
+            } else {
+                break;
+            }
+        }
+        if backslashes % 2 == 0 {
+            return Some(*idx);
+        }
+    }
+    None
+}
+
+fn extract_permission_subject(input: &str) -> Option<String> {
+    let parsed = serde_json::from_str::<Value>(input).ok();
+    if let Some(Value::Object(object)) = parsed {
+        for key in [
+            "command",
+            "path",
+            "file_path",
+            "filePath",
+            "notebook_path",
+            "notebookPath",
+            "url",
+            "pattern",
+            "code",
+            "message",
+        ] {
+            if let Some(value) = object.get(key).and_then(Value::as_str) {
+                return Some(value.to_string());
+            }
+        }
+    }
+
+    (!input.trim().is_empty()).then(|| input.to_string())
 }
 
 #[cfg(test)]
 mod tests {
     use super::{
-        PermissionMode, PermissionOutcome, PermissionPolicy, PermissionPromptDecision,
+        PermissionContext, PermissionMode, PermissionOutcome, PermissionOverride, PermissionPolicy,
-        PermissionPrompter, PermissionRequest,
+        PermissionPromptDecision, PermissionPrompter, PermissionRequest,
     };
+    use crate::config::RuntimePermissionRuleConfig;
 
     struct RecordingPrompter {
         seen: Vec<PermissionRequest>,
@@ -229,4 +556,120 @@ mod tests {
             PermissionOutcome::Deny { reason } if reason == "not now"
         ));
     }
+
+    #[test]
+    fn applies_rule_based_denials_and_allows() {
+        let rules = RuntimePermissionRuleConfig::new(
+            vec!["bash(git:*)".to_string()],
+            vec!["bash(rm -rf:*)".to_string()],
+            Vec::new(),
+        );
+        let policy = PermissionPolicy::new(PermissionMode::ReadOnly)
+            .with_tool_requirement("bash", PermissionMode::DangerFullAccess)
+            .with_permission_rules(&rules);
+
+        assert_eq!(
+            policy.authorize("bash", r#"{"command":"git status"}"#, None),
+            PermissionOutcome::Allow
+        );
+        assert!(matches!(
+            policy.authorize("bash", r#"{"command":"rm -rf /tmp/x"}"#, None),
+            PermissionOutcome::Deny { reason } if reason.contains("denied by rule")
+        ));
+    }
+
+    #[test]
+    fn ask_rules_force_prompt_even_when_mode_allows() {
+        let rules = RuntimePermissionRuleConfig::new(
+            Vec::new(),
+            Vec::new(),
+            vec!["bash(git:*)".to_string()],
+        );
+        let policy = PermissionPolicy::new(PermissionMode::DangerFullAccess)
+            .with_tool_requirement("bash", PermissionMode::DangerFullAccess)
+            .with_permission_rules(&rules);
+        let mut prompter = RecordingPrompter {
+            seen: Vec::new(),
+            allow: true,
+        };
+
+        let outcome = policy.authorize("bash", r#"{"command":"git status"}"#, Some(&mut prompter));
+
+        assert_eq!(outcome, PermissionOutcome::Allow);
+        assert_eq!(prompter.seen.len(), 1);
+        assert!(prompter.seen[0]
+            .reason
+            .as_deref()
+            .is_some_and(|reason| reason.contains("ask rule")));
+    }
+
+    #[test]
+    fn hook_allow_still_respects_ask_rules() {
+        let rules = RuntimePermissionRuleConfig::new(
+            Vec::new(),
+            Vec::new(),
+            vec!["bash(git:*)".to_string()],
+        );
+        let policy = PermissionPolicy::new(PermissionMode::ReadOnly)
+            .with_tool_requirement("bash", PermissionMode::DangerFullAccess)
+            .with_permission_rules(&rules);
+        let context = PermissionContext::new(
+            Some(PermissionOverride::Allow),
+            Some("hook approved".to_string()),
+        );
+        let mut prompter = RecordingPrompter {
+            seen: Vec::new(),
+            allow: true,
+        };
+
+        let outcome = policy.authorize_with_context(
+            "bash",
+            r#"{"command":"git status"}"#,
+            &context,
+            Some(&mut prompter),
+        );
+
+        assert_eq!(outcome, PermissionOutcome::Allow);
+        assert_eq!(prompter.seen.len(), 1);
+    }
+
+    #[test]
+    fn hook_deny_short_circuits_permission_flow() {
+        let policy = PermissionPolicy::new(PermissionMode::DangerFullAccess)
+            .with_tool_requirement("bash", PermissionMode::DangerFullAccess);
+        let context = PermissionContext::new(
+            Some(PermissionOverride::Deny),
+            Some("blocked by hook".to_string()),
+        );
+
+        assert_eq!(
+            policy.authorize_with_context("bash", "{}", &context, None),
+            PermissionOutcome::Deny {
+                reason: "blocked by hook".to_string(),
+            }
+        );
+    }
+
+    #[test]
+    fn hook_ask_forces_prompt() {
+        let policy = PermissionPolicy::new(PermissionMode::DangerFullAccess)
+            .with_tool_requirement("bash", PermissionMode::DangerFullAccess);
+        let context = PermissionContext::new(
+            Some(PermissionOverride::Ask),
+            Some("hook requested confirmation".to_string()),
+        );
+        let mut prompter = RecordingPrompter {
+            seen: Vec::new(),
+            allow: true,
+        };
+
+        let outcome = policy.authorize_with_context("bash", "{}", &context, Some(&mut prompter));
+
+        assert_eq!(outcome, PermissionOutcome::Allow);
+        assert_eq!(prompter.seen.len(), 1);
+        assert_eq!(
+            prompter.seen[0].reason.as_deref(),
+            Some("hook requested confirmation")
+        );
+    }
 }

rust/crates/rusty-claude-cli/Cargo.toml

@@ -20,7 +20,7 @@ runtime = { path = "../runtime" }
 plugins = { path = "../plugins" }
 serde_json = "1"
 syntect = "5"
-tokio = { version = "1", features = ["rt-multi-thread", "time"] }
+tokio = { version = "1", features = ["rt-multi-thread", "signal", "time"] }
 tools = { path = "../tools" }
 
 [lints]

rust/crates/rusty-claude-cli/src/main.rs

@@ -10,9 +10,9 @@ use std::io::{self, Read, Write};
 use std::net::TcpListener;
 use std::path::{Path, PathBuf};
 use std::process::Command;
-use std::sync::mpsc::{self, RecvTimeoutError};
+use std::sync::mpsc::{self, Receiver, RecvTimeoutError, Sender};
 use std::sync::{Arc, Mutex};
-use std::thread;
+use std::thread::{self, JoinHandle};
 use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
 
 use api::{
@@ -903,6 +903,8 @@ fn run_resume_command(
         | SlashCommand::Permissions { .. }
         | SlashCommand::Session { .. }
         | SlashCommand::Plugins { .. }
+        | SlashCommand::Agents { .. }
+        | SlashCommand::Skills { .. }
         | SlashCommand::Unknown(_) => Err("unsupported resumed slash command".into()),
     }
 }
@@ -970,6 +972,61 @@ struct LiveCli {
     session: SessionHandle,
 }
 
+struct HookAbortMonitor {
+    stop_tx: Option<Sender<()>>,
+    join_handle: Option<JoinHandle<()>>,
+}
+
+impl HookAbortMonitor {
+    fn spawn(abort_signal: runtime::HookAbortSignal) -> Self {
+        Self::spawn_with_waiter(abort_signal, move |stop_rx, abort_signal| {
+            let Ok(runtime) = tokio::runtime::Builder::new_current_thread()
+                .enable_all()
+                .build()
+            else {
+                return;
+            };
+
+            runtime.block_on(async move {
+                let wait_for_stop = tokio::task::spawn_blocking(move || {
+                    let _ = stop_rx.recv();
+                });
+
+                tokio::select! {
+                    result = tokio::signal::ctrl_c() => {
+                        if result.is_ok() {
+                            abort_signal.abort();
+                        }
+                    }
+                    _ = wait_for_stop => {}
+                }
+            });
+        })
+    }
+
+    fn spawn_with_waiter<F>(abort_signal: runtime::HookAbortSignal, wait_for_interrupt: F) -> Self
+    where
+        F: FnOnce(Receiver<()>, runtime::HookAbortSignal) + Send + 'static,
+    {
+        let (stop_tx, stop_rx) = mpsc::channel();
+        let join_handle = thread::spawn(move || wait_for_interrupt(stop_rx, abort_signal));
+
+        Self {
+            stop_tx: Some(stop_tx),
+            join_handle: Some(join_handle),
+        }
+    }
+
+    fn stop(mut self) {
+        if let Some(stop_tx) = self.stop_tx.take() {
+            let _ = stop_tx.send(());
+        }
+        if let Some(join_handle) = self.join_handle.take() {
+            let _ = join_handle.join();
+        }
+    }
+}
+
 impl LiveCli {
     fn new(
         model: String,
@@ -1026,7 +1083,35 @@ impl LiveCli {
         )
     }
 
+    fn prepare_turn_runtime(
+        &self,
+        emit_output: bool,
+    ) -> Result<
+        (
+            ConversationRuntime<AnthropicRuntimeClient, CliToolExecutor>,
+            HookAbortMonitor,
+        ),
+        Box<dyn std::error::Error>,
+    > {
+        let hook_abort_signal = runtime::HookAbortSignal::new();
+        let runtime = build_runtime(
+            self.runtime.session().clone(),
+            self.model.clone(),
+            self.system_prompt.clone(),
+            true,
+            emit_output,
+            self.allowed_tools.clone(),
+            self.permission_mode,
+            None,
+        )?
+        .with_hook_abort_signal(hook_abort_signal.clone());
+        let hook_abort_monitor = HookAbortMonitor::spawn(hook_abort_signal);
+
+        Ok((runtime, hook_abort_monitor))
+    }
+
     fn run_turn(&mut self, input: &str) -> Result<(), Box<dyn std::error::Error>> {
+        let (mut runtime, hook_abort_monitor) = self.prepare_turn_runtime(true)?;
         let mut spinner = Spinner::new();
         let mut stdout = io::stdout();
         spinner.tick(
@@ -1035,7 +1120,9 @@ impl LiveCli {
             &mut stdout,
         )?;
         let mut permission_prompter = CliPermissionPrompter::new(self.permission_mode);
-        let result = self.runtime.run_turn(input, Some(&mut permission_prompter));
+        let result = runtime.run_turn(input, Some(&mut permission_prompter));
+        hook_abort_monitor.stop();
+        self.runtime = runtime;
         match result {
             Ok(summary) => {
                 spinner.finish(
@@ -1076,19 +1163,11 @@ impl LiveCli {
     }
 
     fn run_prompt_json(&mut self, input: &str) -> Result<(), Box<dyn std::error::Error>> {
-        let session = self.runtime.session().clone();
+        let (mut runtime, hook_abort_monitor) = self.prepare_turn_runtime(false)?;
-        let mut runtime = build_runtime(
-            session,
-            self.model.clone(),
-            self.system_prompt.clone(),
-            true,
-            false,
-            self.allowed_tools.clone(),
-            self.permission_mode,
-            None,
-        )?;
         let mut permission_prompter = CliPermissionPrompter::new(self.permission_mode);
-        let summary = runtime.run_turn(input, Some(&mut permission_prompter))?;
+        let result = runtime.run_turn(input, Some(&mut permission_prompter));
+        hook_abort_monitor.stop();
+        let summary = result?;
         self.runtime = runtime;
         self.persist_session()?;
         println!(
@@ -1197,6 +1276,14 @@ impl LiveCli {
             SlashCommand::Plugins { action, target } => {
                 self.handle_plugins_command(action.as_deref(), target.as_deref())?
             }
+            SlashCommand::Agents { .. } => {
+                eprintln!("/agents is not fully wired yet");
+                false
+            }
+            SlashCommand::Skills { .. } => {
+                eprintln!("/skills is not fully wired yet");
+                false
+            }
             SlashCommand::Unknown(name) => {
                 eprintln!("unknown slash command: /{name}");
                 false
@@ -2746,7 +2833,7 @@ fn build_runtime(
 ) -> Result<ConversationRuntime<AnthropicRuntimeClient, CliToolExecutor>, Box<dyn std::error::Error>>
 {
     let (feature_config, plugin_registry, tool_registry) = build_runtime_plugin_state()?;
-    Ok(ConversationRuntime::new_with_plugins(
+    let mut runtime = ConversationRuntime::new_with_plugins(
         session,
         AnthropicRuntimeClient::new(
             model,
@@ -2757,11 +2844,48 @@ fn build_runtime(
             progress_reporter,
         )?,
         CliToolExecutor::new(allowed_tools.clone(), emit_output, tool_registry.clone()),
-        permission_policy(permission_mode, &tool_registry),
+        permission_policy(permission_mode, &feature_config, &tool_registry),
         system_prompt,
         feature_config,
         plugin_registry,
-    )?)
+    )?;
+    if emit_output {
+        runtime = runtime.with_hook_progress_reporter(Box::new(CliHookProgressReporter));
+    }
+    Ok(runtime)
+}
+
+struct CliHookProgressReporter;
+
+impl runtime::HookProgressReporter for CliHookProgressReporter {
+    fn on_event(&mut self, event: &runtime::HookProgressEvent) {
+        match event {
+            runtime::HookProgressEvent::Started {
+                event,
+                tool_name,
+                command,
+            } => eprintln!(
+                "[hook {event_name}] {tool_name}: {command}",
+                event_name = event.as_str()
+            ),
+            runtime::HookProgressEvent::Completed {
+                event,
+                tool_name,
+                command,
+            } => eprintln!(
+                "[hook done {event_name}] {tool_name}: {command}",
+                event_name = event.as_str()
+            ),
+            runtime::HookProgressEvent::Cancelled {
+                event,
+                tool_name,
+                command,
+            } => eprintln!(
+                "[hook cancelled {event_name}] {tool_name}: {command}",
+                event_name = event.as_str()
+            ),
+        }
+    }
 }
 
 struct CliPermissionPrompter {
@@ -3611,9 +3735,13 @@ impl ToolExecutor for CliToolExecutor {
     }
 }
 
-fn permission_policy(mode: PermissionMode, tool_registry: &GlobalToolRegistry) -> PermissionPolicy {
+fn permission_policy(
+    mode: PermissionMode,
+    feature_config: &runtime::RuntimeFeatureConfig,
+    tool_registry: &GlobalToolRegistry,
+) -> PermissionPolicy {
     tool_registry.permission_specs(None).into_iter().fold(
-        PermissionPolicy::new(mode),
+        PermissionPolicy::new(mode).with_permission_rules(feature_config.permission_rules()),
         |policy, (name, required_permission)| {
             policy.with_tool_requirement(name, required_permission)
         },
@@ -3763,14 +3891,18 @@ mod tests {
         normalize_permission_mode, parse_args, parse_git_status_metadata, permission_policy,
         print_help_to, push_output_block, render_config_report, render_memory_report,
         render_repl_help, resolve_model_alias, response_to_events, resume_supported_slash_commands,
-        status_context, CliAction, CliOutputFormat, InternalPromptProgressEvent,
+        status_context, CliAction, CliOutputFormat, HookAbortMonitor, InternalPromptProgressEvent,
         InternalPromptProgressState, SlashCommand, StatusUsage, DEFAULT_MODEL,
     };
     use api::{MessageResponse, OutputContentBlock, Usage};
     use plugins::{PluginTool, PluginToolDefinition, PluginToolPermission};
-    use runtime::{AssistantEvent, ContentBlock, ConversationMessage, MessageRole, PermissionMode};
+    use runtime::{
+        AssistantEvent, ContentBlock, ConversationMessage, HookAbortSignal, MessageRole,
+        PermissionMode,
+    };
     use serde_json::json;
     use std::path::PathBuf;
+    use std::sync::mpsc;
     use std::time::Duration;
     use tools::GlobalToolRegistry;
 
@@ -4031,7 +4163,11 @@ mod tests {
 
     #[test]
     fn permission_policy_uses_plugin_tool_permissions() {
-        let policy = permission_policy(PermissionMode::ReadOnly, &registry_with_plugin_tool());
+        let policy = permission_policy(
+            PermissionMode::ReadOnly,
+            &runtime::RuntimeFeatureConfig::default(),
+            &registry_with_plugin_tool(),
+        );
         let required = policy.required_mode_for("plugin_echo");
         assert_eq!(required, PermissionMode::WorkspaceWrite);
     }
@@ -4668,4 +4804,43 @@ mod tests {
         ));
         assert!(!String::from_utf8(out).expect("utf8").contains("step 1"));
     }
+
+    #[test]
+    fn hook_abort_monitor_stops_without_aborting() {
+        let abort_signal = HookAbortSignal::new();
+        let (ready_tx, ready_rx) = mpsc::channel();
+        let monitor = HookAbortMonitor::spawn_with_waiter(
+            abort_signal.clone(),
+            move |stop_rx, abort_signal| {
+                ready_tx.send(()).expect("ready signal");
+                let _ = stop_rx.recv();
+                assert!(!abort_signal.is_aborted());
+            },
+        );
+
+        ready_rx.recv().expect("waiter should be ready");
+        monitor.stop();
+
+        assert!(!abort_signal.is_aborted());
+    }
+
+    #[test]
+    fn hook_abort_monitor_propagates_interrupt() {
+        let abort_signal = HookAbortSignal::new();
+        let (done_tx, done_rx) = mpsc::channel();
+        let monitor = HookAbortMonitor::spawn_with_waiter(
+            abort_signal.clone(),
+            move |_stop_rx, abort_signal| {
+                abort_signal.abort();
+                done_tx.send(()).expect("done signal");
+            },
+        );
+
+        done_rx
+            .recv_timeout(Duration::from_secs(1))
+            .expect("interrupt should complete");
+        monitor.stop();
+
+        assert!(abort_signal.is_aborted());
+    }
 }

rust/crates/rusty-claude-cli/src/render.rs

@@ -286,7 +286,7 @@ impl TerminalRenderer {
     ) {
         match event {
             Event::Start(Tag::Heading { level, .. }) => {
-                self.start_heading(state, level as u8, output);
+                Self::start_heading(state, level as u8, output);
             }
             Event::End(TagEnd::Paragraph) => output.push_str("\n\n"),
             Event::Start(Tag::BlockQuote(..)) => self.start_quote(state, output),
@@ -426,8 +426,7 @@ impl TerminalRenderer {
         }
     }
 
-    #[allow(clippy::unused_self)]
+    fn start_heading(state: &mut RenderState, level: u8, output: &mut String) {
-    fn start_heading(&self, state: &mut RenderState, level: u8, output: &mut String) {
         state.heading_level = Some(level);
         if !output.is_empty() {
             output.push('\n');