feat(self-improvement-assistant): add autonomous codebase analysis plugin

[konard]

Summary

Implements the self-improvement-assistant plugin requested in issue #113.

The plugin provides four tools for autonomous codebase analysis and GitHub issue creation:

• self_analyze_codebase — fetches a GitHub repo's file tree, reads JS/TS source files, and applies heuristic pattern analysis to detect bugs, security vulnerabilities, performance issues, and readability problems. Results are persisted to a local SQLite database.
• self_create_issue — creates a well-formatted GitHub issue from any analysis finding, with severity badge, file path, description, and fix suggestion. Requires admin scope.
• self_schedule_analysis — enables or disables periodic autonomous analysis (configurable interval). Requires admin scope.
• self_list_analysis_history — lists past analysis runs from the local log.

Detected patterns (heuristic, no LLM required)

Category	Pattern	Severity
Security	eval() usage	Critical
Security	new Function()	High
Security	innerHTML = assignment	High
Security	Credential logging	Critical
Security	Weak hash (MD5/SHA-1)	Medium
Performance	async in forEach	Medium
Performance	Missing timer cleanup	Low
Readability	Empty catch blocks	Medium
Readability	Loose equality (==)	Low
Readability	Raw console.* calls	Low
Tests	Large files without tests	Low

Security

• GitHub token stored exclusively via sdk.secrets — never logged
• Issue creation is scope: admin-only
• auto_create_issues defaults to false — requires explicit user action
• All GitHub API calls use AbortSignal.timeout(15_000)

Files added

• plugins/self-improvement-assistant/index.js — plugin implementation
• plugins/self-improvement-assistant/manifest.json — plugin metadata
• plugins/self-improvement-assistant/README.md — documentation
• registry.json — plugin entry added

How to reproduce / test

# Load test
node -e "import('./plugins/self-improvement-assistant/index.js').then(m => { const t = m.tools({}); console.log(t.length, 'tools exported') })"

# Or: verify module exports
node --input-type=module <<'EOJS'
const mod = await import('./plugins/self-improvement-assistant/index.js');
console.log('exports:', Object.keys(mod).join(', '));
const tools = mod.tools({ secrets: { get: () => undefined }, log: { info: ()=>{}, warn: ()=>{}, error: ()=>{} }, db: null, storage: { get: ()=>undefined, set: ()=>{} }, pluginConfig: {} });
console.log(tools.length, 'tools:', tools.map(t => t.name).join(', '));
EOJS

Fixes #113

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This PR was created automatically by the AI issue solver

[konard]

🤖 Solution Draft Log

This log file contains the complete execution trace of the AI solution draft process.

💰 Cost estimation:

• Public pricing estimate: $0.954452
• Calculated by Anthropic: $0.954452 USD
• Difference: $-0.000000 (-0.00%)

📊 Context and tokens usage:

• Context window: 67.2K / 1M input tokens (7%), 17.3K / 64K output tokens (27%)

Total: 56.2K + 1.6M cached input tokens, 17.3K output tokens, $0.954452 cost

🤖 Models used:

• Tool: Anthropic Claude Code
• Requested: sonnet
• Model: Claude Sonnet 4.6 (claude-sonnet-4-6)

📎 Log file uploaded as Gist (715KB)

• View complete solution draft log

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Now working session is ended, feel free to review and add any feedback on the solution draft.

[konard]

🔄 Auto-restart triggered (iteration 1)

Reason: CI failures detected

Starting new session to address the issues.

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Auto-restart-until-mergeable mode is active. Will continue until PR becomes mergeable.

[konard]

🔄 Auto-restart-until-mergeable Log (iteration 1)

This log file contains the complete execution trace of the AI solution draft process.

💰 Cost estimation:

• Public pricing estimate: $0.438425
• Calculated by Anthropic: $0.438425 USD
• Difference: $0.000000 (+0.00%)

📊 Context and tokens usage:

• Context window: 43.6K / 1M input tokens (4%), 3.7K / 64K output tokens (6%)

Total: 33.8K + 855.0K cached input tokens, 3.7K output tokens, $0.438425 cost

🤖 Models used:

• Tool: Anthropic Claude Code
• Requested: sonnet
• Model: Claude Sonnet 4.6 (claude-sonnet-4-6)

📎 Log file uploaded as Gist (1256KB)

• View complete solution draft log

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Now working session is ended, feel free to review and add any feedback on the solution draft.