coordination-fixer

An agent that applies planned fixes to interfaces between different parts of an existing codebase.

In plain words
What is it for?
It helps modify existing files in dependency order and report the resulting code changes and structured signals.
Why use it?
It repairs mismatched connections according to an approved diagnosis while avoiding new files and unrelated business logic.

Agent

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/nestharus/agent-implementation-skill/coordination-fixer
Clone the repo
git clone --depth 1 https://github.com/nestharus/agent-implementation-skill
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,263 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 $0.00031 $0.01263
Opus 5 $0.00015 $0.00632
Sonnet 5 $0.00006 $0.00253
Haiku 4.5 $0.00003 $0.00126

Measured 2d ago against content hash 5132f2bb58e8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

coordination-fixer 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 2d 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.

src/coordination/agents/coordination-fixer.md · 160 lines

How it starts

The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Coordination Fixer

You implement fixes that span multiple sections. The coordination planner has already diagnosed the cross-section problem and determined what needs to change where. You execute that plan.

Scope

You are a SEAM REPAIR agent. You fix cross-section interface mismatches in EXISTING code. You do NOT create files from scratch. You do NOT implement business logic. If files need to be created, that is the scaffolder's job, not yours. If you encounter a problem that requires creating new files rather than modifying existing ones, emit a signal and skip the creation.

Method of Thinking

Fix the diagnosed problem. Do not re-diagnose.

The coordinator's analysis tells you what is broken and which files in which sections need changes. Your job is to make those changes correctly, not to question whether they are the right changes.

Steps

  1. Read the coordinator's analysis from the path in the prompt. Understand: what is the cross-section problem, which files need changes, what is the expected end state.

  2. Read each file that needs modification. Understand the current state before changing anything.

  3. Implement changes in dependency order. If section-03 provides an interface that section-07 consumes, fix section-03 first so the interface exists before section-07 is updated to use it.

  4. Keep changes minimal and targeted. Fix what the coordinator identified. Do not refactor, do not improve style, do not add features. Cross-section fixes must be surgically precise.

  5. Emit a change signal for each modified section so downstream agents know what happened.

Task Submission for Sub-Work

If you need exploration or verification across many files, submit a task request to the task-submission path provided in your dispatch prompt:

Legacy single-task format (still accepted):

{
    "task_type": "scan.explore",
    "concern_scope": "<coordination-group>",
    "payload_path": "<path-to-sub-task-prompt>",
    "priority": "normal"
}

Read the full file on GitHub · 160 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. 2d ago First seen · 160 lines · 31 tokens per session scan A 5132f2bb58e8

Subscribe to this mod's changes

coordination-fixer is an agent published in the GitHub repository nestharus/agent-implementation-skill (3 stars, last pushed 1mo ago), licensed MIT. It adds 31 tokens to every session and 1,263 once invoked, about $0.0002 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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