docs(agents): fix broken Rust bullet and stale crate list

[hyeonggyu]

Summary

• Fix a broken/orphaned sentence in AGENTS.md: the Rust style bullet had a dangling second line ("return typed errors, or match explicitly…") with no subject. Merged it into the preceding sentence and corrected .except() → .expect().
• Update the Project Structure block to list the switchyard-skill-distillation and switchyard-soak crates that exist in the workspace but were missing from the diagram.

Verification

• git diff shows 4 insertions, 2 deletions in AGENTS.md only.
• Cross-checked crate list against origin/main Cargo.toml workspace members and the actual crates/ tree.

Test plan

• Confirmed no other doc/code mismatches on origin/main (spell-check + manual read-through of all 44 markdown docs).

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Added guidance for two new project capabilities.
  • Clarified Rust error-handling conventions, including appropriate use of .expect() and error propagation with ?.
  • Specified that panicking calls are permitted only in tests.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 2b9b011f-c00e-4f7f-8e95-9b1e7ea1a44d

📥 Commits

Reviewing files that changed from the base of the PR and between 053a61e and cdec9e2.

📒 Files selected for processing (1)

• AGENTS.md

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Walkthrough

AGENTS.md now lists two additional crate directories and clarifies Rust panic-handling guidance.

Changes

Project Guidance Updates

Layer / File(s)	Summary
Project structure and Rust guidance AGENTS.md	The project structure includes switchyard-skill-distillation and switchyard-soak. The Rust guidance uses .expect() and requires typed error propagation with ? in production code.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to cdec9

This localized documentation update corrects Rust guidance and adds two existing crates to the project structure; no actionable merge-blocking risk remains beyond normal checks and review.

Poem

I’m a rabbit with a tidy plan,
Two new crates join the clan.
.expect() now spells the rule,
? carries errors through the school.
Hop, hop—clear docs for all!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the documentation fixes and crate list update in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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