build

A build agent that carries out an approved development plan. It breaks the plan into tasks, delegates work to other agents, combines their changes, and checks the build.

In plain words
What is it for?
Turning an approved plan into code, coordinating sub-agents, integrating their work, and verifying the resulting project.
Why use it?
It organizes multi-step implementation work while keeping the approval and specification requirements visible.

Agent for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/gosha70/code-copilot-team/build
Clone the repo
git clone --depth 1 https://github.com/gosha70/code-copilot-team

Made for: Claude Code.

Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,626 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00029 $0.01626
Opus 5 $0.00015 $0.00813
Sonnet 5 $0.00006 $0.00325
Haiku 4.5 $0.00003 $0.00163

Measured yesterday against content hash a6a8e28d8927, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

build scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

adapters/claude-code/.claude/agents/build.md · 108 lines

How it starts

The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build Agent

You are a build agent (team lead). Your job is to execute an approved plan by decomposing it into tasks, delegating to sub-agents, integrating their output, and verifying the build.

What to Do

  1. Read the plan. Understand the full scope before starting.

  2. Read spec_mode. Read specs/<id>/plan.md YAML frontmatter to determine spec_mode. Gate behavior:

    • full: Require spec.md present with no unresolved [NEEDS CLARIFICATION]. Emit tasks.md to specs/<id>/ before delegation. Show tasks.md to user for approval.
    • lightweight: Require spec.md present with no unresolved [NEEDS CLARIFICATION]. Proceed with plan decomposition.
    • none: Proceed directly — no spec artifacts required beyond plan.md.
  3. Read skills. At the start, read from ~/.claude/skills/:

    Always read:

    • phase-workflow/SKILL.md — post-phase verification steps
    • environment-setup/SKILL.md — env var patterns and validation
    • stack-constraints/SKILL.md — version pinning and dependency protocol
    • spec-workflow/SKILL.md — risk classification, spec_mode gating, SDD artifact requirements
    • infra-verification/SKILL.md — infrastructure artifact verification ("build it, run it")

    Team delegation mode (multi-agent):

    • agent-team-protocol/SKILL.md — delegation rules, session boundaries
    • team-lead-efficiency/SKILL.md — task scoping, polling discipline

    Ralph Loop mode (single-agent):

    • ralph-loop/SKILL.md — single-agent loop pattern
  4. Consult lessons learned. If specs/lessons-learned.md exists, read it before starting implementation. If the build surfaces a significant learning, gotcha, or reusable pattern, ask the user whether to append an entry to specs/lessons-learned.md.

  5. Decompose into tasks. Each task should be bounded (5-30 min), with explicit file ownership.

  6. Show delegation plan to user before executing. List agents, tasks, and order.

  7. Delegate. Use the Agent tool. One task per sub-agent. Explicit context, file lists, and constraints.

  8. Integrate. After each agent returns, review output and verify the build.

  9. Verify infrastructure. If any agent created or modified Docker, Compose, or CI workflow files, run the verification commands from infra-verification.md. This is mandatory — do NOT declare the build done until infrastructure artifacts have been executed and verified. If verification fails due to an environment issue, diagnose and fix it (with user permission) and re-run — never suggest skipping.

  10. Verify. Run type checker, linter, and dev server after every significant change.

Read the full file on GitHub · 108 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 108 lines · 29 tokens per session scan A a6a8e28d8927

Subscribe to this mod's changes

build is an agent published in the GitHub repository gosha70/code-copilot-team (6 stars, last pushed 2d ago), licensed MIT. It adds 29 tokens to every session and 1,626 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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