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.
npx skills add ErikaAX08/erikas-skills --skill spec-kit-sync-artifactsgit clone --depth 1 https://github.com/ErikaAX08/erikas-skillsWrote 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.
[](https://agentmods.dev/skills/erikaax08/erikas-skills/spec-kit-sync-artifacts)<a href="https://agentmods.dev/skills/erikaax08/erikas-skills/spec-kit-sync-artifacts"><img src="https://agentmods.dev/badge/skills/erikaax08/erikas-skills/spec-kit-sync-artifacts/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.
<a href="https://agentmods.dev/skills/erikaax08/erikas-skills/spec-kit-sync-artifacts"><img src="https://agentmods.dev/badge/skills/erikaax08/erikas-skills/spec-kit-sync-artifacts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00145 | $0.04321 |
| Opus 5.5 | $0.00058 | $0.01728 |
| Sonnet 5.5 | $0.00029 | $0.00864 |
| Haiku 4.5 | $0.00015 | $0.00432 |
Grade A, and why
spec-kit-sync-artifacts 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.
How it starts
The opening of the file, as written. The whole thing — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sync Artifacts — Drift Detection Skill
Purpose
Answer, with evidence, the question this whole kit exists to answer for the user: did something this specification/plan/tasks depended on change since it was generated, and if so, what needs to be regenerated? This is the mechanism behind "if the file a spec was generated from changes importantly, the plan and tasks should be able to update accordingly."
This skill is deliberately narrow: it detects and reports, using the Content Fingerprint
Convention (spec-kit-shared/artifact-conventions.md). It does not regenerate anything itself
— that stays spec-kit-generate-spec's, spec-kit-generate-plan's, or spec-kit-generate-tasks's own "Updating an Existing
X" procedure, each already written to propagate a change through only the sections it actually
touches. spec-kit-sync-artifacts is the shared, canonical definition of the mechanical comparison those
skills' own Fase 0 steps already rely on — they reference this file instead of each re-describing
hashing/comparison logic independently.
User Input
$ARGUMENTS
Always consider the complete user message and any files or attachments available in the current
conversation, even when $ARGUMENTS appears literally or is empty. The most common inputs are: a
feature directory to check, or an explicit note that a specific source document was just edited.
Core Principle
Detection is mechanical. Classification is semantic and stays with whoever regenerates. Propagation is one hop at a time, and never silent.
- A hash mismatch means "something changed" — not "this is a material change requiring a
cascade." The consuming skill (
spec-kit-generate-spec,spec-kit-generate-plan,spec-kit-generate-tasks) makes that judgment when it re-invokes its own "Updating an Existing X" procedure. - After a source changes, recommend regenerating the directly dependent artifact first (the spec that cites it). Do not presume what the plan or tasks will need until the spec's actual, regenerated content is known — a cascade is a sequence of confirmed hops, not one leap.
- A task already marked
[x]is never silently touched by anything this skill triggers — it is flagged for review instead.
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.
- today Changed · +8 lines 080d478f433a
- yesterday Changed 922e50cd4662
- 3d ago Changed · +40 lines 8be2af0e7711
- 1mo ago First seen · 258 lines · 145 tokens per session scan A 6be946676a29
spec-kit-sync-artifacts is a skill published in the GitHub repository ErikaAX08/erikas-skills (5 stars, last pushed yesterday), licensed Apache-2.0. It adds 145 tokens to every session and 4,321 once invoked, about $0.0006 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.
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