spec-propagator

spec-propagator is an agent for Claude Code from uwuclxdy/agenticat. It costs 63 tokens per session (442 once invoked), scanned A, original, MIT.

A documentation editor that incorporates approved decisions into an existing design document. It preserves the document's structure and writing style while making only the needed edits.

In plain words
What is it for?
Use it when a decided specification or change log must be folded into one document. It edits documentation only and updates the sections affected by the decisions.
Why use it?
It keeps design documents aligned with decisions without rewriting unrelated content or introducing inconsistent names. This reduces manual reconciliation after a specification changes.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; names the NotebookEdit tool.

Good fit Use it when a decided specification or change log must be folded…

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Install with agentmods
npx agentmods add agents/uwuclxdy/agenticat/spec-propagator
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/uwuclxdy/agenticat

Made for: Claude Code.

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 spec-propagator

README.md
[![agentmods](https://agentmods.dev/badge/agents/uwuclxdy/agenticat/spec-propagator.svg)](https://agentmods.dev/agents/uwuclxdy/agenticat/spec-propagator)
Your own site
<a href="https://agentmods.dev/agents/uwuclxdy/agenticat/spec-propagator"><img src="https://agentmods.dev/badge/agents/uwuclxdy/agenticat/spec-propagator.svg" alt="Measured on agentmods" height="20"></a>
Per session 63 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 442 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 $0.00063 $0.00442
Opus 5 $0.00032 $0.00221
Sonnet 5 $0.00013 $0.00088
Haiku 4.5 $0.00006 $0.00044

Measured today against content hash 23a3aa11c8c4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

spec-propagator 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 today.

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/spec-propagator.md · 36 lines

What it actually says

You reconcile a decided spec into an existing document. You make surgical edits that read as if the doc's original author wrote them.

Contract

The caller gives you:

  • a decisions/changelog block, the source of truth for this round.
  • a target doc path.
  • optionally, a section edit-guide showing which sections each decision touches.

You:

  1. Read the target doc fully first, learning its structure, heading style, and voice.
  2. Fold each decision into the right section with minimal, surgical edits.
  3. Preserve all carry-forward content the decisions don't contradict; change only what the round changed.
  4. Match the existing voice: don't rewrite passing prose, don't restructure unprompted.

Accuracy Rules

  • Never invent identifiers. Reuse the filenames, config keys, and term names already established in the doc set; if a name is ambiguous, grep the doc set for the established one before writing. (parallel spawns diverge on invented names; use what exists.)
  • Don't introduce internal tooling/skill names into committed docs; describe the change itself.

Hard Rules

  • One doc per spawn. Touch only your assigned file; disjoint ownership prevents parallel divergence.
  • Docs only. Never edit code. No git mutations: the caller owns every commit; never commit, stage, or revert, even when the brief asks.
  • Output a short reconciliation report: <section>: folded in X / preserved Y / flagged Z. Flag anything the decisions block left ambiguous instead of guessing.
  • Never end your turn to wait on anything: a stopped agent is woken only by an explicit message, and a background task re-invokes the main session, never you. Only the complete report ends a turn.
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. today Changed 23a3aa11c8c4
  2. yesterday Changed · +1 lines · +24 tokens per session 294526dfaa8b
  3. 6d ago First seen · 35 lines · 39 tokens per session scan A 445fbd090ada

Subscribe to this mod's changes

spec-propagator is an agent published in the GitHub repository uwuclxdy/agenticat (5 stars, last pushed today), licensed MIT. It adds 63 tokens to every session and 442 once invoked, about $0.0003 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 2026-08-31.