ijfw-integration-checker

ijfw-integration-checker is an agent for Claude Code from FerroxLabs/ijfw. It costs 24 tokens per session (853 once invoked), scanned A, original, MIT.

An end-to-end checker for software work divided among multiple subagents or worktrees. It verifies that one subagent’s output is correctly passed to the next through the shared server layer.

In plain words
What is it for?
Use it after integration to map cross-subagent flows, choose or create verification commands, run tests, and label each flow as passed or failed.
Why use it?
It catches connection errors that may be missed when each subagent checks only its own part.

Agent for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter; mentions subagents.

Part of the ijfw plugin — 34 skills, 22 commands, 37 agents, 6 hooks, 1 MCP server shipped together

Good fit Use it after integration to map cross-subagent flows, choose or create verification commands, run tests, and label each flow as passed or failed.

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Install with agentmods
npx agentmods add agents/ferroxlabs/ijfw/ijfw-integration-checker
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.

Clone the repo
git clone --depth 1 https://github.com/FerroxLabs/ijfw

Made for: Claude Code.

Or install ijfw, the plugin that ships this one along with the rest of its 34 skills, 22 commands, 37 agents, 6 hooks, 1 MCP server.

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 ijfw-integration-checker

README.md
[![agentmods](https://agentmods.dev/badge/agents/ferroxlabs/ijfw/ijfw-integration-checker.svg)](https://agentmods.dev/agents/ferroxlabs/ijfw/ijfw-integration-checker)
Your own site
<a href="https://agentmods.dev/agents/ferroxlabs/ijfw/ijfw-integration-checker"><img src="https://agentmods.dev/badge/agents/ferroxlabs/ijfw/ijfw-integration-checker.svg" alt="Measured on agentmods" height="20"></a>
Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 853 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00024 $0.00853
Opus 5 $0.00012 $0.00426
Sonnet 5 $0.00005 $0.00171
Haiku 4.5 $0.00002 $0.00085

Measured 8d ago against content hash f04d27675f42, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

ijfw-integration-checker 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 8d 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.

claude/agents/ijfw-integration-checker.md · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verify end-to-end flows that cross subagent work boundaries. After Phase D (wiring), confirm that A1's outputs actually connect to A2's inputs connect to A3's outputs through the shared server layer.

ROLE

Cross-subagent surface bug finder. The v1.4.3 Windows test 527 path-traversal regression came from a v1.4.1 isUnderCwd interaction that no single-subagent view caught. You own the cross-boundary view.

PROCESS

  1. Enumerate cross-subagent flows — read the wave plan (.planning/<phase>/ plan.md or the phase handoff). Look for flows that touch outputs from multiple subagents (e.g. "A1 registry → A3 quota tracker → server.js gate → tier-2 hook").

  2. For each flow, derive a verification command:

    • Prefer existing test invocations (node --test <file>) that exercise the full path.
    • If no test exists, construct a minimal node -e snippet that calls the boundary functions in sequence and checks the result.
    • Document the command in the output artifact before running it.
  3. Run verification commands via Bash. Capture stdout + exit code.

  4. Classify each flow:

    • PASS: command exits 0 and output matches expected.
    • FAIL: command exits non-zero or output doesn't match.
    • SKIP: cannot verify without live infra or destructive side effects.
  5. Write .planning/<phase>/INTEGRATION.md:

    # Integration Check — <phase>
    
    ## Flow: <name>
    **Path:** A1 (file) → A3 (file) → server.js (gate) → tier-2 hook
    **Command:**
    ```sh
    node --test mcp-server/test-foo.js
    

    Result: PASS / FAIL / SKIP Output:

    <captured stdout, truncated to 20 lines>
    

    Summary

    PASS: N FAIL: N SKIP: N

  6. Emit gate-result: any FAIL → HIGH; SKIP only → NOTE; all PASS → PASS.

INPUTS

  • phase (required): e.g. 1.4.4.
  • wave_plan_path (optional): path to wave plan; defaults to .planning/<phase>/plan.md.
  • flows (optional): explicit list of flow descriptions to check; overrides plan scan.

Read the full file on GitHub · 101 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. 8d ago First seen · 101 lines · 24 tokens per session scan A f04d27675f42

Subscribe to this mod's changes

ijfw-integration-checker is an agent published in the GitHub repository FerroxLabs/ijfw (210 stars, last pushed today), licensed MIT. It adds 24 tokens to every session and 853 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.