Three MCP tool groups were orphaned from the ambient CLAUDE.md context
because they shipped no `*.instructions.md` alongside their source.
Backfill them so the composer picks them up as fragments on next spawn:
- core.instructions.md: add `send_file` (artifact delivery, path relative
to /workspace/agent/) and `add_reaction` (by `#N` id with emoji
shortcode name).
- interactive.instructions.md: `ask_user_question` (blocking
multiple-choice with selectedLabel/value option objects, 300s default
timeout) and `send_card` (non-blocking structured render with
fallbackText). Opens with a one-line framing of the contrast between
the two.
- agents.instructions.md: `create_agent` with how-it-works, when-to-use
(companions vs collaborators — persistent memory vs independent
parallel work), when-NOT-to-use (short tasks should use the SDK `Agent`
tool instead), and guidance for writing the seed instructions string.
No composer changes — scan in `src/claude-md-compose.ts` already picks up
any file matching `*.instructions.md` in the mcp-tools directory.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Move every agent-specific instruction out of the shared container/CLAUDE.md
so the base is genuinely universal. Persona/identity now comes from the
system-prompt addendum (buildSystemPromptAddendum now takes assistantName
and prepends "# You are {name}"). Per-module instructions live alongside
each MCP tool source:
container/agent-runner/src/mcp-tools/core.instructions.md
container/agent-runner/src/mcp-tools/scheduling.instructions.md
container/agent-runner/src/mcp-tools/self-mod.instructions.md
composeGroupClaudeMd() scans that directory and emits `module-<name>.md`
fragments as symlinks to /app/src/mcp-tools/<name>.instructions.md (valid
via the existing RO source mount). Skill fragments renamed to
`skill-<name>.md` for naming consistency with `module-*` and `mcp-*`.
Mount tightening so composer-managed files can't be clobbered by agent
writes: nested RO mounts for /workspace/agent/CLAUDE.md and
/workspace/agent/.claude-fragments/. CLAUDE.local.md (per-group memory)
stays RW as the only writable CLAUDE.md-family file.
.gitignore: ignore CLAUDE.local.md, .claude-shared.md, .claude-fragments/
everywhere, and simplify groups/ rules to ignore the whole tree (per-
installation state, not tracked).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
