System prompt with repo context (README, conventions, issue history)

[nev-offload]

Problem

The agent currently runs with minimal context about the repository it's working on. It needs a proper system prompt that gives it repo-specific knowledge.

Expected behavior

• Agent receives a rich system prompt including:
  • Repository README (or summary)
  • Recent commit history / changelog
  • Open issues and their status
  • PR context (if responding to a PR)
  • Repo conventions (language, framework, testing approach)
  • Custom instructions from .openclaw.yml config file

Implementation notes

• Fetch README.md content via GitHub API
• Fetch recent commits (git log --oneline -20)
• Fetch open issues list (titles + labels)
• Support a .openclaw.yml or .github/openclaw.yml config file for custom instructions:

  system_prompt: "You are a helpful code reviewer focused on TypeScript best practices"
  context:
    include_readme: true
    recent_commits: 20
    open_issues: true

• Be mindful of context window limits — summarize large READMEs
• Cache context between runs (use Actions Cache)

Priority

P1 — Agent quality depends heavily on context. Without this, responses will be generic.

[nev-offload]

✅ Implemented in commit e854138

Changes:

• Created src/context.ts — builds rich repo context:

  • Fetches README.md (truncates if too large)
  • Fetches recent commits (last 10 by default)
  • Fetches open issues list (up to 15)
  • Parses .openclaw.yml config for custom system prompt and settings

• Updated src/triggers.ts — injects context into all event messages

• Added .openclaw.yml config support:

system_prompt: |
  You are a code reviewer for a TypeScript project.
  Focus on type safety and error handling.

context:
  include_readme: true
  readme_max_chars: 4000
  recent_commits: 10
  open_issues: true
  max_issues: 15

• Updated README with full documentation

Next up: #2 (PR review functionality)