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prospec: Skill for Claude Code

.agents/skills/prospec-knowledge-update/SKILL.md

prospec-knowledge-update is a skill for Claude Code, Codex from benwu95/prospec. It costs 81 tokens per session (4,065 once invoked), scanned A, original, MIT.

A documentation update workflow that reads a change specification, finds the affected software modules, and updates only the related project knowledge. A module is a focused part of a codebase, such as a package or service.

In plain words
What is it for?
Use it to update module README files, a project index, and a module map after a change. It is intended for incremental knowledge synchronization and requires the Prospec command-line program.
Why use it?
It keeps documentation focused and avoids rescanning the whole project for every change. User-written sections are preserved during updates.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md; installed under .agents/ (shared by several agents); mentions AGENTS.md.

This is benwu95/prospec's own configuration. It tells Claude Code and Codex how to work on prospec itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything prospec configures →

not rated 6repo changed yesterday A scan 81 tokens original MIT
View source ↗ benwu95/prospec benwu95.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to benwu95/prospec. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/benwu95/prospec/main/.agents/skills/prospec-knowledge-update/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/benwu95/prospec

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.

agentmods badge for prospec-knowledge-update

README.md
[![agentmods](https://agentmods.dev/badge/skills/benwu95/prospec/prospec-knowledge-update/github.svg)](https://agentmods.dev/skills/benwu95/prospec/prospec-knowledge-update)
Your own site
<a href="https://agentmods.dev/skills/benwu95/prospec/prospec-knowledge-update"><img src="https://agentmods.dev/badge/skills/benwu95/prospec/prospec-knowledge-update/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 prospec-knowledge-update

Your own site · 80×15
<a href="https://agentmods.dev/skills/benwu95/prospec/prospec-knowledge-update"><img src="https://agentmods.dev/badge/skills/benwu95/prospec/prospec-knowledge-update.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 81 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,065 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 $0.00081 $0.04065
Opus 5.5 $0.00032 $0.01626
Sonnet 5.5 $0.00016 $0.00813
Haiku 4.5 $0.00008 $0.00407

Measured yesterday against content hash 1e57625a0c83, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

prospec-knowledge-update 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 yesterday.

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.

.agents/skills/prospec-knowledge-update/SKILL.md · 232 lines

How it starts

The opening of the file, as written. The whole thing — 232 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Prospec Knowledge Update Skill

Activation

When triggered, briefly describe:

  • That you'll parse delta-spec.md to identify affected modules
  • Only affected modules will be scanned (not the entire codebase)
  • Module README.md (Recipe-First format), prospec/index.md, and module-map.yaml will be updated incrementally
  • User-written sections (prospec:user-start/end) are always preserved

Language Policy

Write each generated document in the language the Constitution's Language Policy rule assigns to its path — change artifacts and their archived summaries in the project's artifact language, the trust zone (Knowledge base, Feature Specs, index) in English. One skill run may write both. Free text you pass the CLI that lands in a change artifact follows the artifact language too, leaving its paths, commands, enum values and the fixed prefixes the CLI matches untranslated. Keep code, identifiers, technical terms, and git commit messages in English.

CLI Prerequisite (required)

The prospec CLI is a required file for this skill — its deterministic steps call prospec commands. Probe BEFORE any other step; there is no manual fallback.

  1. Run prospec --version (Bash).
  2. Command not found / not executable → STOP. Ask the user to install the prospec standalone executable — the one-click installer script from the project README (macOS/Linux install.sh, Windows install.ps1) or a release binary from GitHub Releases; prospec is NOT published to npm. Then re-run this skill.
  3. Version older than 2.10.0 → STOP. Report the installed vs required version and ask the user to upgrade, then re-run this skill.

Hand-executing a CLI-owned mutation is NEVER the fallback — that re-introduces the nondeterministic serialization this contract exists to remove.

Startup Loading

  1. [STABLE] Read prospec/ai-knowledge/_conventions.md — team conventions (incl. the Module READMEs pointer)
  2. [STABLE] MANDATORY — Read prospec/ai-knowledge/_module-readme-conventions.md for the canonical README output format (dated marker, Core section order, # {ProperName} title, prospec:auto/prospec:user marker contract, and the Project Section Extensions registry — the only extension authority, not .prospec.yaml)
  3. [DYNAMIC] Read .prospec/changes/[name]/delta-spec.md — identify ADDED/MODIFIED/REMOVED requirements
  4. [DYNAMIC] Read prospec/index.md — current module index
  5. [DYNAMIC] Read prospec/ai-knowledge/module-map.yaml — current dependency graph (if exists)

Read the full file on GitHub · 232 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. yesterday Changed 1e57625a0c83
  2. 3d ago Changed · +2 lines 16b9ab2875e6
  3. 4d ago Changed · +2 lines c51d6285db6e
  4. 9d ago Changed fe8d67620b12
  5. 11d ago Changed 7763c66a7a36
  6. 12d ago Changed 6f353ba9497c
  7. 13d ago Changed 1954468bb561
  8. 20d ago Changed · -6 lines 54019a6d64ce
  9. 23d ago Changed 70268c1344f4
  10. 28d ago First seen · 234 lines · 81 tokens per session scan A b1e8381b83d4

Subscribe to this mod's changes

prospec-knowledge-update is a skill published in the GitHub repository benwu95/prospec (6 stars, last pushed yesterday), licensed MIT. It adds 81 tokens to every session and 4,065 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 2026-08-31.

agentic-codingai-coding-assistantai-knowledgeprogressive-disclosuresddspec-driven-development
Related

prospec-knowledge-update compared with skills from other repositories

prospec-knowledge-update next to 6 skills from other repositories
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ospec-changeclawplays/ospecSkill3902mo agoMITA18Codex
review-spdzhu1090093659/spec_driven_developSkill9933mo agoMITA72Claude Code
deep-discusszhu1090093659/spec_driven_developSkill9933mo agoMITA181Claude Code
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