build
Plan-then-execute implementation against SPEC.md. Native single-thread loop, no sub-agents. On test or build failure, auto-invokes the backprop skill before retrying — a failed verification always considers whether a new §V invariant would prevent recurrence. Triggers when the user asks to build, implement, execute the spec, or tackle a specific §T task (`build §T.3`, `build --next`, `implement next task`, `run the build`). Expects SPEC.md to exist; if not, defers to the spec skill.
Install
With your agent
Install OMGSkills skill "juliusbrussee/cavekit:build" into this agent's normal skills directory: call the OMGSkills MCP get_install_plan tool for your agent and run the script it returns (it installs only the pinned commit and verifies SKILL.md), and stop if MCP or the pin is unavailable. Do not overwrite or change existing skills without asking me.
Manual command
git clone https://github.com/JuliusBrussee/cavekit /tmp/cavekit && ln -s /tmp/cavekit/skills/build ~/.claude/skills/buildFrom README
build — implement spec Single-thread native plan→execute. You are main Claude. No swarm. LOAD Read SPEC.md. If missing → tell user to invoke the spec skill first. Stop. Read FORMAT.md once if not loaded. Read §R if present — external facts the build must honor, ⊥ re-derive or contradict. Parse invocation args: §T.n → that task only --next → lowest-numbered row with status . or --all or empty → every . row in §T order High blast radius (shared module, auth, data, money, public §I)? Run /review first. Trivial & reversible? Skip planning ceremony, just do step EXECUTE. PLAN Native plan mode — you delegate to it, you do not reinvent task breakdown. For chosen task(s): Cite every §V invariant that applies. Plan must respect all. Cite every §I interface touched. Plan must preserve shape. List files to create / edit. Verification contract — name the EXACT test(s) / acceptance criteria that prove each §V touched. Which test, not "add tests".