[syarihu]

What

There was no direct way to tell whether Laya was actually in effect. The only signal was whether search results happened to carry a semantic_score, and a missing score could mean Laya was disabled, the daemon failed to start, or it was unsupported on the platform.

This PR adds a Laya status to lk stats and the MCP get_stats tool: whether Laya is supported and enabled, and whether its daemon is running.

The check only pings an already-running daemon and never spawns one, so running stats stays fast and does not load the model. daemon: "stopped" is normal while idle — the daemon starts on the next command that needs it.

Changes

• src/laya.rs:
  • Added status(), which returns supported / enabled / daemon (running or stopped) / model / socket_path, plus daemon_model reported by the daemon's ping when it is running.
  • Added status_line() for the text output of lk stats (e.g. enabled, daemon running (<model>), enabled, daemon stopped (starts on demand), unsupported (macOS Apple Silicon only)).
  • Added unit tests: test_status_does_not_spawn_when_socket_missing and test_status_line.
• src/mcp.rs: Added a laya field to the get_stats result and mentioned it in the tool description.
• src/cmd/stats.rs: Added a Laya: line to the text output and a laya field to --json.
• README.md: Documented how to check the Laya status and the semantic_score field in search results.

Notes

• With LK_NO_LAYA=1, the output can read disabled, daemon running when a daemon started by another session is still alive. lk does not use it in that case, so the output reflects the actual state.

Tests

• cargo test: 239 unit / 135 integration passed (1 pre-existing ignored).
• cargo clippy --all-targets: clean.
• Checked manually on Apple Silicon: lk stats, lk stats --json, and get_stats via lk mcp all report daemon: "running" with the daemon up.

Summary by CodeRabbit

• New Features

  • Added Laya status information to statistics output in JSON and human-readable formats.
  • Status includes platform support, enablement, daemon state, configured model, socket path, and running model.
  • Added semantic reranking and duplicate detection status to MCP statistics.
  • Status checks do not start a daemon when none is running.

• Documentation

  • Clarified Laya status checks, startup behavior, and when semantic_score appears in search results.

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📝 Walkthrough

Walkthrough

The PR adds Laya status APIs. CLI and MCP statistics now expose Laya status. Documentation describes status checks, daemon behavior, and reranked result fields.

Changes

Laya status reporting

Layer / File(s)	Summary
Laya status API and tests src/laya.rs	Adds status and status_line. The status check pings an existing daemon without spawning one. Tests cover supported, unsupported, running, stopped, and disabled states.
CLI and MCP statistics integration src/cmd/stats.rs, src/mcp.rs	CLI statistics include Laya status in JSON and text output. MCP get_stats includes a laya response field and updated tool documentation.
Status documentation README.md	Documents Laya status reporting, non-spawning checks, daemon startup conditions, and semantic_score fields.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant CLIStats
  participant MCPGetStats
  participant LayaStatus
  participant LayaDaemon
  CLIStats->>LayaStatus: Request status
  MCPGetStats->>LayaStatus: Request status
  LayaStatus->>LayaDaemon: Ping existing daemon
  LayaDaemon-->>LayaStatus: Return daemon state and model
  LayaStatus-->>CLIStats: Return status for text and JSON output
  LayaStatus-->>MCPGetStats: Return status in laya field

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Merge Risk: 🔵 Low · up to 3d1fe

Mergeable with a small documentation correction so consumers do not assume every reranked result contains semantic_score.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 72.73% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 3 files. (1 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 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 main change: adding Laya status to lk stats and the MCP get_stats tool.
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.

Full details: Docstring Coverage

Explanation

Docstring coverage is 72.73% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 3 files. (1 skipped: 1 unsupported.)

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Inline comments:
In `@README.md`:
- Around line 664-670: Update the “Checking Status” documentation to scope
semantic_score to structured scored results: state that reranked CLI JSON and
MCP search-result entries include it, while plain-text CLI output does not.

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