build-harness

name	build-harness
description	Trigger when the user asks to build, create, generate, or customize their own AI agent harness ("make my harness", "build my harness"). Routes the conversation to the BYOH MCP tools and drives the full profile → build → install flow. The conversation IS the interview/wizard.

Build a Personalized Harness (BYOH)

When the user wants their own AI agent harness, drive the BYOH MCP tools (byoh server) through this flow. Do not shell out to the byoh CLI directly — call the MCP tools. The conversation with the user is the interview/wizard; you collect answers in natural language and feed them to the tools.

Tools

profile_create, profile_scan, profile_interview, profile_confirm, build, author_skill, author_doc, enable_hook, list_overrides, delete_override, render_plugin, install_plugin, catalog_search, catalog_vendor. (profile_read to inspect state.)

Flow

Drive these phases in order. build and install_plugin require a confirmed profile and will refuse a draft.

1. Collect (S1) — ask what the user does and where their materials live.

   • profile_create (slug, optional scan_paths, optional language) to start a profile.
   • profile_scan (slug, paths) to non-destructively gather derived candidates.

2. Interview (S2, in-conversation) — ask the user the open questions surfaced by profile_interview. Map their answers to (answer, confidence) and call profile_interview again. Only explicit answers are applied — unanswered questions stay open, so you can ask one question per turn and call again. The four genres are developer | creator | researcher | business (pass the one the user wants to profile_confirm — no separate listing tool).

3. Confirm (S3) — once genre + goal are settled:

   • profile_confirm (slug, genre, goal_30d) → status becomes confirmed.

4. Build — build (slug, run_dry_run) synthesizes the bundle (compile + preset injection + static gate) and classifies every skill:

   • matched_skills — got real preset bodies.
   • skeleton_skills — still genre-template placeholders. This is where you learn whether the harness is content-complete or hollow. run_dry_run: true also probes dependency tools (missing → graceful fallback).

5. Iterate or install — read skeleton_skills and decide with the user:

   • Empty / acceptable skeletons → go to step 6.
   • Needed skills still skeletons → author them with author_skill: write real Process / Anti-Rationalization / Evidence / Red Flags content for the domain, then build again. authored_skills grows, skeleton_skills shrinks. If the local preset catalog doesn't cover the domain, catalog_search then catalog_vendor (the sharing route). Safety gates (critic/seesaw/stagnation) are not authorable — author_skill refuses them; their bodies stay the vetted preset (gate integrity is a Rust invariant).

6. Render & install (S4) — produce and deploy the harness:

   • render_plugin (slug, target, out) to render the host-native plugin tree. The output is a static polyglot plugin (skills/agents/manifests, incl. .claude-plugin/marketplace.json) — push it to GitHub and it installs via claude plugin marketplace add.
   • Ask the user for the install scope before installing:
     • local — this project only (./.claude/skills/); HOME untouched.
     • global — the user's HOME (~/.claude, ~/.codex, ~/.gemini).
     • publish — add LICENSE + .gitignore, no activation, return git steps. If they don't pick one, omit scope (writes dist/ only, activates nothing).
   • install_plugin (slug, scope, target) to write it to dist/ and, per the scope, activate on the host. BYOH ships no embedded knowledge base — if the user needs retrieval, point the generated harness at a doc server like alcove.

Rules

• The conversation is the UI. Never ask the user to run CLI commands.
• Mask anything that looks like a secret before echoing material back.
• If a tool returns dependency_missing, treat it as a graceful fallback, not an error — tell the user the optional tool isn't installed.

After install

There is no evolve tool. Improvement is a conversational retrospective in later sessions: observe how the skills perform, note where they stay hollow, then re-interview the profile and rebuild. The loop is human-in-the-loop, not a tool call.

Never edit an installed tree directly. A dist/byoh-<slug>/ carrying .byoh-manifest with "owned": true is a rebuildable artifact, not a place to patch by hand — render_plugin/install_plugin atomically replace the whole tree from the synthesized bundle every time. To persist a content change, use author_skill / author_doc — those write to the profile overlay that build reads back, so the change survives every rebuild and surfaces in authored_skills/authored_docs. delete_override removes one. The preset (registry/presets/) and catalog_vendor routes are for sharing a skill across profiles, not per-profile fixes.