gap

A report of how often the coding agent actually uses the context and tools loaded for it. It also shows which tool results mostly add noise.

In plain words
What is it for?
Use it to measure context use by category and inspect tool usefulness over a chosen evidence period. Run it when deciding what context or tools to keep.
Why use it?
It reveals which loaded information earns its place and which consumes context without helping. This helps identify unnecessary context or noisy tools.

Skill for Claude CodeCodex

Part of the skillreaper plugin — 2 skills 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 skills/thousandflowers/skillreaper/gap
Any agent
npx skills add thousandflowers/skillreaper --skill gap
Clone the repo
git clone --depth 1 https://github.com/thousandflowers/skillreaper

Made for: Claude Code, Codex.

Or install skillreaper, the plugin that ships this one along with the rest of its 2 skills.

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 459 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 $0.00048 $0.00459
Opus 5 $0.00024 $0.00230
Sonnet 5 $0.00010 $0.00092
Haiku 4.5 $0.00005 $0.00046

Measured 3d ago against content hash bb7127b55cb9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

gap 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 3d 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.

plugins/skillreaper/skills/gap/SKILL.md · 55 lines

What it actually says

skillreaper - loaded vs fired

Run reap gap --agent, then paste its output verbatim.

Do not reformat, re-order, summarise, truncate or re-align anything, and do not add a heading or a table of your own: the binary already renders the report, including its closing attribution line.

Arguments

Append any $ARGUMENTS tokens that begin with -; ignore anything else and say so. --days N sets the evidence window (default 30).

If reap is not installed

Decide with command -v reap and nothing else - never an absolute path, never a filesystem search: a copy found off PATH may be an older build, and silently using it hides a broken install.

If that fails, print exactly this and nothing else:

reap is not installed. Run it once without installing anything:

npx skillreaper

Or install it permanently:

brew install thousandflowers/tap/skillreaper
go install github.com/thousandflowers/skillreaper/cmd/reap@latest

If reap is too old

reap gap --agent needs reap ≥ 0.5.0. If it exits with flag provided but not defined: -agent, say the installed build is too old and give brew upgrade skillreaper (npm: npm install -g skillreaper@latest) - an upgrade, never the install block above, which they have already done.

Reading it out

After the pasted report you may add one or two sentences, no more. Name the worst category by token reach rather than by item count - a hundred unused 5-token agents matter less than three unused 300-token skills. /skillreaper:reap lists the specific items.

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. 3d ago First seen · 55 lines · 48 tokens per session scan A bb7127b55cb9

Subscribe to this mod's changes

gap is a skill published in the GitHub repository thousandflowers/skillreaper (54 stars, last pushed 4d ago), licensed MIT. It adds 48 tokens to every session and 459 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 2026-08-30.