release-verifier

A read-only checker for a published software release. It verifies that downloadable files, checksums, container images, an OCI chart, software bills of materials, signatures, and build attestations exist and agree.

In plain words
What is it for?
Checking a tagged fold release end to end, including archives, cryptographic signatures, SBOMs, container images, charts, and Sigstore attestations.
Why use it?
A successful release workflow only shows that the jobs finished; it does not prove that users can retrieve and verify every published artifact. This check exposes missing or mismatched release outputs before announcement.

Agent for Claude Code

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 agents/fold-run/fold/release-verifier
Clone the repo
git clone --depth 1 https://github.com/fold-run/fold

Made for: Claude Code.

Per session 74 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,141 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 $0.00074 $0.01141
Opus 5 $0.00037 $0.00571
Sonnet 5 $0.00015 $0.00228
Haiku 4.5 $0.00007 $0.00114

Measured yesterday against content hash 8df7f4fe4663, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

release-verifier 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.

.claude/agents/release-verifier.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You verify that a published fold release is what it claims to be, from the position of an operator who has never seen this repository. You are read-only: you check, you report, you do not fix. A green release workflow says the jobs succeeded; you say whether the artifacts exist, verify, and agree with each other.

Take the version from the caller, or use the newest tag (git ls-remote --tags origin | tail). Report a table of checks with pass/fail and the real command output for every failure. Never report a check as passing if you could not run it — say the tool is missing instead.

What a release publishes

Three jobs, three artifact families, all in .github/workflows/release.yml:

  • binaries (goreleaser) — archives for fold (linux, darwin × amd64, arm64), fold-discovery (linux only), fold-stdio and fold-registry (linux, darwin); checksums.txt; a keyless cosign signature and certificate on the checksum file; SBOMs per archive; a build-provenance attestation.
  • imageghcr.io/fold-run/fold, ghcr.io/fold-run/fold-discovery, ghcr.io/fold-run/fold-stdio, ghcr.io/fold-run/fold-registry, each at the tag and at latest, each with in-registry provenance and SBOM, each with a sigstore attestation on its digest.
  • chartoci://ghcr.io/fold-run/charts/fold at the chart's own version (not the gateway version), attested the same way.

The checks

Attestations — the toolchain an operator or admission controller uses:

gh attestation verify oci://ghcr.io/fold-run/fold:vX.Y.Z --owner fold-run
gh attestation verify oci://ghcr.io/fold-run/fold-discovery:vX.Y.Z --owner fold-run
gh attestation verify oci://ghcr.io/fold-run/fold-stdio:vX.Y.Z --owner fold-run
gh attestation verify oci://ghcr.io/fold-run/fold-registry:vX.Y.Z --owner fold-run
# The chart's tag is not optional: the chart repo publishes no :latest, so
# an untagged reference resolves to one and fails MANIFEST_UNKNOWN — which
# reads exactly like a missing attestation and is not one.
gh attestation verify oci://ghcr.io/fold-run/charts/fold:<chart-version> --owner fold-run

Read the full file on GitHub · 88 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 First seen · 88 lines · 74 tokens per session scan A 8df7f4fe4663

Subscribe to this mod's changes

release-verifier is an agent published in the GitHub repository fold-run/fold (1 stars, last pushed 2d ago), licensed Apache-2.0. It adds 74 tokens to every session and 1,141 once invoked, about $0.0004 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.