What is router-context-scan?

A quick workspace inventory for the routing agent, the component that decides how a request should be handled. It reports installed plugins, active tasks, pending approvals and subtasks, and large-workspace warnings.

Run it during task triage to summarize the workspace without requiring the router to inspect every file itself.

It gives the router the context needed to choose between dispatching work, asking for confirmation, or escalating for human input.

router-context-scan — Skill for Claude Code and Codex by cintia09

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.

Any agent

npx skills add cintia09/CodeNook --skill router-context-scan

Clone the repo

git clone --depth 1 https://github.com/cintia09/CodeNook

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/cintia09/codenook/router-context-scan/github.svg)](https://agentmods.dev/skills/cintia09/codenook/router-context-scan)

Your own site

<a href="https://agentmods.dev/skills/cintia09/codenook/router-context-scan"><img src="https://agentmods.dev/badge/skills/cintia09/codenook/router-context-scan/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/cintia09/codenook/router-context-scan"><img src="https://agentmods.dev/badge/skills/cintia09/codenook/router-context-scan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 483 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.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.00483
Opus 5.5	$0.00000	$0.00193
Sonnet 5.5	$0.00000	$0.00097
Haiku 4.5	$0.00000	$0.00048

Measured 2mo ago against content hash 6b20e5804842, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

router-context-scan 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (_scan.py, scan.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/codenook-core/skills/builtin/router-context-scan/SKILL.md · 58 lines

What it actually says

router-context-scan (builtin skill)

Role

Lightweight, fast workspace inventory consumed by the router sub-agent at every triage call. Produces a ≤2KB JSON envelope summarising:

which plugins are installed (id + version)
which tasks are active (status != done/cancelled), capped by --max-tasks
pending HITL queue size
pending fan-out subtask count (sum of subtasks[] lengths across active tasks)
workspace warnings (>100MB on disk OR >10K files)

The router uses this output to decide whether to dispatch, ask for confirmation, or escalate to HITL — without needing to walk the workspace itself.

CLI

scan.sh [--workspace <dir>] [--max-tasks N] [--json]

--workspace — defaults to upward search for a .codenook/ ancestor; exit 2 if none found.
--max-tasks — truncate active_tasks (default 20).
--json — currently the only output format (reserved for future human-readable mode); accepting it is a no-op flag.

Exit codes

code	meaning
0	scan complete
2	usage / workspace not located

Output schema

{
  "installed_plugins":  [{"id": "...", "version": "..."}, ...],
  "active_tasks":       [{"task_id": "T-001", "plugin": "...",
                          "phase": "...", "last_tick_at": "..."}],
  "hitl_pending":       0,
  "fanout_pending":     0,
  "workspace_warnings": ["..."]
}

Implementation notes

O(n) scan of .codenook/plugins/*/plugin.yaml and .codenook/tasks/*/state.json; no shell-outs to git/find for size.
File-count and byte-count walks are bounded — they short-circuit once they exceed the warning thresholds (10K files, 100MB).
Output is shrunk to ≤2KB by truncating workspace_warnings first, then reasons in active_tasks; never the structural fields.

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

2mo ago First seen · 58 lines · 0 tokens per session scan A 6b20e5804842

Subscribe to this mod's changes

router-context-scan is a skill published in the GitHub repository cintia09/CodeNook (5 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 483 tokens. 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.

Building agents

router-context-scan next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
router-context-scancintia09/CodeNook	Skill	5	1mo ago	MIT	A	0	Claude Code, Codex
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	2d ago	MIT	A	200	Claude Code, Codex
playwright-climicrosoft/playwright	Skill	100k	2d ago	Apache-2.0	A	19	Claude Code
browser-automationopenclaw/openclaw	Skill	394k	yesterday	MIT	A	36	Claude Code
systematic-debuggingobra/superpowers	Skill	315k	5d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code