ase-spec-lint

ase-spec-lint is a skill for Claude Code from rse/ase. It costs 64 tokens per session (7,490 once invoked), scanned A, original, Apache-2.0.

A specification-linting skill for SpecBook projects. It examines requirements for syntax, formatting, clarity, logical gaps, and whether they contain enough detail for implementation.

In plain words
What is it for?
It is for checking selected quality aspects in specification files, reading related format and schema files, and reporting or fixing the findings under the project's rules.
Why use it?
It helps find specification problems before developers build from incomplete or contradictory requirements.

Skill for Claude Code

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

Part of the ase plugin — 60 skills, 11 agents, 5 hooks shipped together

Good fit It is for checking selected quality aspects in specification files, reading related format and schema files, and reporting or fixing the findings under the project's rules.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rse/ase/ase-spec-lint
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 rse/ase --skill ase-spec-lint
Clone the repo
git clone --depth 1 https://github.com/rse/ase

Made for: Claude Code.

Or install ase, the plugin that ships this one along with the rest of its 60 skills, 11 agents, 5 hooks.

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 ase-spec-lint

README.md
[![agentmods](https://agentmods.dev/badge/skills/rse/ase/ase-spec-lint/github.svg)](https://agentmods.dev/skills/rse/ase/ase-spec-lint)
Your own site
<a href="https://agentmods.dev/skills/rse/ase/ase-spec-lint"><img src="https://agentmods.dev/badge/skills/rse/ase/ase-spec-lint/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.

agentmods 80×15 button for ase-spec-lint

Your own site · 80×15
<a href="https://agentmods.dev/skills/rse/ase/ase-spec-lint"><img src="https://agentmods.dev/badge/skills/rse/ase/ase-spec-lint.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,490 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 $0.00064 $0.07490
Opus 5.5 $0.00026 $0.02996
Sonnet 5.5 $0.00013 $0.01498
Haiku 4.5 $0.00006 $0.00749

Measured 19d ago against content hash 83c5811ae8d9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ase-spec-lint 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 19d 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.

plugin/skills/ase-spec-lint/SKILL.md · 696 lines

How it starts

The opening of the file, as written. The whole thing — 696 lines — stays where its author put it; the contents beside it link to each section on GitHub.

@${CLAUDE_SKILL_DIR}/../../meta/ase-control.md @${CLAUDE_SKILL_DIR}/../../meta/ase-skill.md @${CLAUDE_SKILL_DIR}/../../meta/ase-dialog.md @${CLAUDE_SKILL_DIR}/../../meta/ase-getopt.md

$ARGUMENTS

  1. The project source artifacts are classified as a black box, so the user does not want them inspected or their problems surfaced (the --force option lifts this skip). Skip the entire investigation and reporting: do not invoke any Bash, Glob, or Agent tool and do not read any source, only output the following and then SKIP the remaining steps STEP 2 and STEP 3:

    Set true if is equal grey and is not equal true, and false otherwise: a condensed report suppresses the full unified diffs of STEP 3.

    First, determine the effective aspect set , i.e., the specification quality aspects which are checked at all. For this, parse and as comma-separated token lists, silently dropping the none sentinel and any empty token. If a token is not one of the aspect ids S01...S10, only output the following and then STOP the entire flow (do not perform any further steps):

    Otherwise set to all ten aspect ids S01...S10 if both lists are empty, to the include list if only it is non-empty, to all ten minus the exclude list if only it is non-empty, and to the include list minus the exclude list if both are non-empty. If the resulting is empty, only output the following and then STOP the entire flow (do not perform any further steps):

    Then split into the per-file aspects (those of S01...S06) and the model-wide aspects (those of S07...S10), as the latter can be judged on the entire specification model only.

    Then, use the following to give a hint on this step:

    Dispatch the investigation to sub-agents via the Agent tool so that no investigation details leak into the user-visible transcript. The sub-agents perform the silent reading and checking; only their final structured return values are consumed here.

    For this, first silently resolve the SPEC artifacts by calling the ase_artifact_list(kind: [ "spec" ]) tool of the ase MCP server once and set to the returned project-relative file list. If is empty, only output the following and then STOP the entire flow (do not perform any further steps):

Read the full file on GitHub · 696 lines

Files

What ships with it

1 file 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.

  1. 19d ago Changed 83c5811ae8d9
  2. 21d ago First seen · 696 lines · 64 tokens per session scan A 9abd0b9a2fc5

Subscribe to this mod's changes

ase-spec-lint is a skill published in the GitHub repository rse/ase (75 stars, last pushed today), licensed Apache-2.0. It adds 64 tokens to every session and 7,490 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-22.

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