fix(cli): surface resolved path in dump-manifests error — ROADMAP #45 partial

Before:
  error: failed to extract manifests: No such file or directory (os error 2)

After:
  error: failed to extract manifests: No such file or directory (os error 2)
    looked in: /Users/yeongyu/clawd/claw-code/rust

The workspace_dir is computed from CARGO_MANIFEST_DIR at compile time and
only resolves correctly when running from the build tree. Surfacing the
resolved path lets users understand immediately why it fails outside the
build context.

ROADMAP #45 root cause (build-tree-only path) remains open.

ROADMAP.md

@@ -515,7 +515,7 @@ Model name prefix now wins unconditionally over env-var presence. Regression tes
 
 44. **Broad-CWD guardrail is warning-only; needs policy-level enforcement** — dogfooded 2026-04-09. `5f6f453` added a stderr warning when claw starts from `$HOME` or filesystem root (live user kapcomunica scanned their whole machine). Warning is a mitigation, not a guardrail: the agent still proceeds with unbounded scope. Follow-up fix shape: (a) add `--allow-broad-cwd` flag to suppress the warning explicitly (for legitimate home-dir use cases); (b) in default interactive mode, prompt "You are running from your home directory — continue? [y/N]" and exit unless confirmed; (c) in `--output-format json` or piped mode, treat broad-CWD as a hard error (exit 1) with `{"type":"error","error":"broad CWD: running from home directory requires --allow-broad-cwd"}`. Source: kapcomunica in #claw-code 2026-04-09; gaebal-gajae ROADMAP note same cycle.
 
-45. **`claw dump-manifests` fails with opaque "No such file or directory"** — dogfooded 2026-04-09. `claw dump-manifests` emits `error: failed to extract manifests: No such file or directory (os error 2)` with no indication of which file or directory is missing, what manifests are, or how to fix it. Fix shape: (a) surface the missing path in the error message; (b) add a pre-check that explains what manifests are and where they should be (e.g. `.claw/manifests/` or the plugins directory); (c) if the command is only valid after `claw init` or after installing plugins, say so explicitly. Source: Jobdori dogfood 2026-04-09.
+45. **`claw dump-manifests` fails with opaque "No such file or directory"** — dogfooded 2026-04-09. `claw dump-manifests` emits `error: failed to extract manifests: No such file or directory (os error 2)` with no indication of which file or directory is missing. **Partial fix at `47aa1a5`+1**: error message now includes `looked in: <path>` so the build-tree path is visible, what manifests are, or how to fix it. Fix shape: (a) surface the missing path in the error message; (b) add a pre-check that explains what manifests are and where they should be (e.g. `.claw/manifests/` or the plugins directory); (c) if the command is only valid after `claw init` or after installing plugins, say so explicitly. Source: Jobdori dogfood 2026-04-09.
 
 46. **`/tokens`, `/cache`, `/stats` were dead spec — parse arms missing** — dogfooded 2026-04-09. All three had spec entries with `resume_supported: true` but no parse arms, producing the circular error "Unknown slash command: /tokens — Did you mean /tokens". Also `SlashCommand::Stats` existed but was unimplemented in both REPL and resume dispatch. **Done at `60ec2ae` 2026-04-09**: `"tokens" | "cache"` now alias to `SlashCommand::Stats`; `Stats` is wired in both REPL and resume path with full JSON output. Source: Jobdori dogfood 2026-04-09.
 

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

@@ -1933,6 +1933,13 @@ fn looks_like_slash_command_token(token: &str) -> bool {
 
 fn dump_manifests(output_format: CliOutputFormat) -> Result<(), Box<dyn std::error::Error>> {
     let workspace_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../..");
+    // Surface the resolved path in the error so users can diagnose missing
+    // manifest files without guessing what path the binary expected.
+    // ROADMAP #45: this path is only correct when running from the build tree;
+    // a proper fix would ship manifests alongside the binary.
+    let resolved = workspace_dir
+        .canonicalize()
+        .unwrap_or_else(|_| workspace_dir.clone());
     let paths = UpstreamPaths::from_workspace_dir(&workspace_dir);
     match extract_manifest(&paths) {
         Ok(manifest) => {
@@ -1954,7 +1961,11 @@ fn dump_manifests(output_format: CliOutputFormat) -> Result<(), Box<dyn std::err
             }
             Ok(())
         }
-        Err(error) => Err(format!("failed to extract manifests: {error}").into()),
+        Err(error) => Err(format!(
+            "failed to extract manifests: {error}\n  looked in: {}",
+            resolved.display()
+        )
+        .into()),
     }
 }