Borrowing it
Nothing to install: this file belongs to christopher-buss/bedrock. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/christopher-buss/bedrock/main/.claude/agents/builder.mdgit clone --depth 1 https://github.com/christopher-buss/bedrockWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/christopher-buss/bedrock/builder)<a href="https://agentmods.dev/agents/christopher-buss/bedrock/builder"><img src="https://agentmods.dev/badge/agents/christopher-buss/bedrock/builder/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/christopher-buss/bedrock/builder"><img src="https://agentmods.dev/badge/agents/christopher-buss/bedrock/builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00025 | $0.00118 |
| Opus 5.5 | $0.00010 | $0.00047 |
| Sonnet 5.5 | $0.00005 | $0.00024 |
| Haiku 4.5 | $0.00003 | $0.00012 |
Grade A, and why
builder 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 5d ago.
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.
What it actually says
Implement the brief in your prompt. Nothing more.
- Follow
CLAUDE.mdand any standards the brief points to. - Do not widen scope. If the brief is ambiguous or blocked, stop and report the question.
- Stop when the brief is done.
Report: files changed, commits made, checks run (command, revision, result), uncommitted changes, open questions.
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.
- 5d ago First seen · 15 lines · 25 tokens per session scan A 4db6c2338de3
builder is an agent published in the GitHub repository christopher-buss/bedrock (19 stars, last pushed today), licensed MIT. It adds 25 tokens to every session and 118 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-10-20.
Other agents, from other repositories
06b-Bicep CodeGen
Expert Azure Bicep IaC specialist that creates near-production-ready Bicep templates following Azure Verified Modules (AVM) standards. Validates, tests, and ensures code quality.
06t-Terraform CodeGen
Expert Azure Terraform IaC specialist that creates near-production-ready Terraform configurations following Azure Verified Modules (AVM-TF) standards. Validates, tests, and ensures code quality.
07b-Bicep Deploy
Executes Azure deployments using generated Bicep templates. Uses azd provision (default; deploy.ps1 retained only for legacy projects without azure.yaml). Performs what-if analysis and manages deployment lifecycle. Step 6 of the agentic workflow.
04-Design
Step 3 — Design Artifacts. Generates code-based Python architecture diagrams and Architecture Decision Records for approved Azure designs. Optional step before governance and IaC planning.
07t-Terraform Deploy
Execute the approved Terraform deployment phase in VS Code Copilot. Verify backend, current saved plan, live policy and separate operation approval, then document actual outcomes. No source repair or implicit apply.
10-Challenger
Optional interactive adversarial review and accepted-fix workflow. Delegates independent findings, preserves freshness and review accounting, and never substitutes for automatic review or human approval.