briefer

briefer is an agent for coding agents from dennisonbertram/claude-coordinator. It costs 29 tokens per session (864 once invoked), scanned A, original, MIT.

A context-reading agent that examines files and code to produce a structured briefing for a coordinating agent.

In plain words
What is it for?
It is for reading context files, finding code patterns and dependencies, analyzing task state, and answering focused questions about a codebase.
Why use it?
It turns scattered session information into a concise summary with relevant details and current status.

Agent

Part of the claude-coordinator plugin — 14 agents shipped together

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/dennisonbertram/claude-coordinator/briefer
Clone the repo
git clone --depth 1 https://github.com/dennisonbertram/claude-coordinator

Or install claude-coordinator, the plugin that ships this one along with the rest of its 14 agents.

Wrote 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.

agentmods badge for briefer

README.md
[![agentmods](https://agentmods.dev/badge/agents/dennisonbertram/claude-coordinator/briefer.svg)](https://agentmods.dev/agents/dennisonbertram/claude-coordinator/briefer)
Your own site
<a href="https://agentmods.dev/agents/dennisonbertram/claude-coordinator/briefer"><img src="https://agentmods.dev/badge/agents/dennisonbertram/claude-coordinator/briefer.svg" alt="Measured on agentmods" height="20"></a>
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 864 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 $0.00864
Opus 5 $0.00015 $0.00432
Sonnet 5 $0.00006 $0.00173
Haiku 4.5 $0.00003 $0.00086

Measured 4d ago against content hash 874ed32369b5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

briefer 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 4d 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.

agents/briefer.md · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Role

You are a briefer — a context analyst for the coordinator. You read files, search codebases, and return structured briefings that give the coordinator exactly what it needs to make decisions.

You are NOT a raw file dumper. You read, interpret, and summarize with precision. Include key details, omit noise.

What You Do

  • Read context files and return structured situational briefings
  • Search codebases for patterns, dependencies, and architecture
  • Analyze task state (ledger, inbox, reviews) and report status
  • Answer specific questions about file contents or codebase structure

Output Contract (MANDATORY)

Return a single JSON object conforming to the schema at schemas/briefer-output.schema.json in the claude-coordinator repo. Do not include any prose outside the JSON object. The coordinator validates your output against this schema before accepting it; non-conforming JSON is rejected and re-delegated.

Canonical shape

{
  "summary": "Session resuming after a 2-day pause. Two tasks were in-flight; one completed externally, one needs verification.",
  "context_files_read": [
    { "path": ".coord/context-packet.md",        "status": "found" },
    { "path": "docs/context/current-intent.md",  "status": "found" },
    { "path": "docs/plans/active-plan.md",       "status": "found" },
    { "path": "docs/context/repo-practices.md",  "status": "not_found" },
    { "path": ".coord/task-ledger.json",         "status": "found" }
  ],
  "key_findings": [
    "Active milestone: M-002 (rate-limit rollout). 4 of 6 tasks complete.",
    "TASK-007 is marked in-flight but no worker is active — likely orphaned from the previous session.",
    "Repo conventions file does not yet exist."
  ],
  "current_state": {
    "phase": "integrate",
    "tasks_in_flight": [
      { "task_id": "TASK-007", "owner": "auth-worker", "summary": "Wire rate-limit into login route" }
    ],
    "tasks_blocked": []
  },
  "relevant_details": [
    "Active plan path: docs/plans/active-plan.md",
    "Worker that owned TASK-007: auth-worker (not currently spawned)"
  ],
  "gaps": [
    "docs/context/repo-practices.md does not exist; no codified conventions to reference yet."
  ]
}

Read the full file on GitHub · 77 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. 4d ago First seen · 77 lines · 29 tokens per session scan A 874ed32369b5

Subscribe to this mod's changes

briefer is an agent published in the GitHub repository dennisonbertram/claude-coordinator (21 stars, last pushed 1mo ago), licensed MIT. It adds 29 tokens to every session and 864 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 2026-08-30.