fix: update README.md version reference from v0.9.16 to v0.9.21

[okwn]

Update the README.md version reference from v0.9.16 to v0.9.21 to match the current version.

Summary by CodeRabbit

• Documentation
  • Updated project metrics: now 1,081+ tests passing.
  • Increased MCP tool count to 53 across documentation and plugin manifests.
  • Refined quick-start installation instructions for global setup guidance.

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📝 Walkthrough

Walkthrough

This PR updates project documentation and plugin manifests to reflect current statistics: test count increased to 1081+ tests, MCP tool surface expanded to 53 tools in proxy mode, and version gate for global installation prompt adjusted to v0.9.21.

Changes

Project Statistics and Tool Count Updates

Layer / File(s)	Summary
Test count documentation updates AGENTS.md, README.md	Test count updated from 950+ to 1081+ in testing requirements, stats section, badge, and development command documentation.
MCP tool count documentation and manifests README.md, plugin/.claude-plugin/plugin.json, plugin/.codex-plugin/plugin.json	MCP tool count updated from 51 to 53 in integration documentation, agent prompt snippets (OpenClaw, Hermes, Codex), configuration comments, and both plugin manifest descriptions.
Quick-start version gate adjustment README.md	Documented version boundary for global installation prompt behavior adjusted from v0.9.16 to v0.9.21.

🎯 1 (Trivial) | ⏱️ ~3 minutes

🐰 Forty-one fresh tests spring to life,
Two more tools to cut through strife—
Stats refreshed and versions true,
Documentation shines anew! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title focuses on a single version reference change (v0.9.16 to v0.9.21), but the PR also includes test count updates (950+ to 1081+), MCP tool count changes (51 to 53), and multiple file modifications beyond just the version reference.	Consider updating the title to reflect the broader scope: something like 'fix: update test counts and MCP tool documentation' would better capture the main changes across multiple files.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)

README.md (1)

415-415: ⚠️ Potential issue | 🟠 Major

Update mcp-standalone test to enforce exact 53-tool count

test/mcp-standalone.test.ts does not currently assert the total MCP tool count is 53—it only checks tools.length is >= 41 and validates a subset of tool names. Update the test to assert the full getAllTools() result size (e.g., expect(tools.length).toBe(53)) so the README/plugin docs change (51→53) is enforced.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@README.md` at line 415, The test currently only checks tools.length >= 41 and
a subset of names; update test/mcp-standalone.test.ts to assert the exact total
tool count returned by getAllTools() is 53 (replace the existing length
assertion with expect(tools.length).toBe(53)) and keep/adjust any name checks to
validate the full toolset if needed; locate the tools variable produced by
getAllTools() in that file and change its expectation accordingly so the test
enforces the README/plugin docs change.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Outside diff comments:
In `@README.md`:
- Line 415: The test currently only checks tools.length >= 41 and a subset of
names; update test/mcp-standalone.test.ts to assert the exact total tool count
returned by getAllTools() is 53 (replace the existing length assertion with
expect(tools.length).toBe(53)) and keep/adjust any name checks to validate the
full toolset if needed; locate the tools variable produced by getAllTools() in
that file and change its expectation accordingly so the test enforces the
README/plugin docs change.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 62ea0b42-5978-49d9-bf59-5f4d5b6ae3c6

📥 Commits

Reviewing files that changed from the base of the PR and between 3551241 and 00d92e3.

📒 Files selected for processing (4)

• AGENTS.md
• README.md
• plugin/.claude-plugin/plugin.json
• plugin/.codex-plugin/plugin.json