sync

A command for checking a Cladding project's spec.yaml file against its required structure and updating the feature inventory.

In plain words
What is it for?
Use it to validate spec.yaml or its split feature files, see the feature count, and make CI fail when the specification is invalid.
Why use it?
It catches invalid specification data before later Cladding checks or stages rely on it. It is mainly needed after editing specification files by hand.

Skill for Claude CodeCodex

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/qwerfunch/cladding/sync
Any agent
npx skills add qwerfunch/cladding --skill sync
Clone the repo
git clone --depth 1 https://github.com/qwerfunch/cladding

Made for: Claude Code, Codex.

Per session 103 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 461 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 $0.00103 $0.00461
Opus 5 $0.00051 $0.00230
Sonnet 5 $0.00021 $0.00092
Haiku 4.5 $0.00010 $0.00046

Measured yesterday against content hash 775c0f990a52, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

sync 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.

plugins/antigravity/skills/sync/SKILL.md · 34 lines

What it actually says

Cladding sync

Run clad sync from the project root. The command:

  • Loads spec.yaml (or its sharded form under spec/features/*.yaml).
  • Validates against src/spec/schema.json (JSONSchema).
  • Reports the feature count and any validation failures.
  • Exits non-zero when the spec is invalid so CI can gate on it.

Spec must be valid before clad check, clad run, or any stage runner produces meaningful output. If sync fails, fix the reported issues first.

clad sync

When you actually need it (don't reflex-sync)

You rarely need to run this MANUALLY — and a reflexive "just-in-case" sync after every operation is wasted work (in an A/B measurement, 28 of 30 manual clad sync calls found nothing to fix). The inventory + validation are already maintained for you:

  • clad_create_feature auto-syncs the inventory after each feature it writes (and rejects a malformed AC at creation), so you don't need to sync after creating features.
  • clad check / clad done validate the spec themselves (drift stage), so you don't need to pre-sync before them — a real drift surfaces in that gate anyway.

Run clad sync only when you have hand-edited a shard file directly (Edit/Write on spec/features/*.yaml or spec.yaml), to refresh the inventory and re-validate that edit. Prefer clad_create_feature over hand-editing in the first place — then even this is unneeded.

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 First seen · 34 lines · 103 tokens per session scan A 775c0f990a52

Subscribe to this mod's changes

sync is a skill published in the GitHub repository qwerfunch/cladding (14 stars, last pushed 3d ago), licensed MIT. It adds 103 tokens to every session and 461 once invoked, about $0.0005 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.

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