What is verify-pin-bump?

A safety procedure for changing the SHA-256 checksum recorded for downloaded Kesha voice models. SHA-256 is a fingerprint used to check that a downloaded file is the expected file.

Use it when a model download fails its checksum check, model manifest tests fail, a mirror returns different weights, or an upstream Hugging Face model was republished.

It prevents a model download from being accepted after the file changes unexpectedly, including when a mirror may be unsafe. It guides deliberate verification before changing the recorded fingerprint.

How drakulavich/kesha-voice-kit configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to drakulavich/kesha-voice-kit. 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/drakulavich/kesha-voice-kit/main/.claude/skills/verify-pin-bump/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/drakulavich/kesha-voice-kit

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/drakulavich/kesha-voice-kit/verify-pin-bump/github.svg)](https://agentmods.dev/skills/drakulavich/kesha-voice-kit/verify-pin-bump)

Your own site

<a href="https://agentmods.dev/skills/drakulavich/kesha-voice-kit/verify-pin-bump"><img src="https://agentmods.dev/badge/skills/drakulavich/kesha-voice-kit/verify-pin-bump/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/drakulavich/kesha-voice-kit/verify-pin-bump"><img src="https://agentmods.dev/badge/skills/drakulavich/kesha-voice-kit/verify-pin-bump.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,648 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 2 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.

Model	Per session	Once invoked
Fable 5.1	$0.00096	$0.01648
Opus 5.5	$0.00038	$0.00659
Sonnet 5.5	$0.00019	$0.00330
Haiku 4.5	$0.00010	$0.00165

Measured 1mo ago against content hash 5d20b20d23c1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

verify-pin-bump scanned grade C with 2 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 1mo ago.

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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf /tmp/pin-bump-cache

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

# or, for a single file, curl directly from the URL in models/manifest.rs:

.claude/skills/verify-pin-bump/SKILL.md · 161 lines

How it starts

The opening of the file, as written. The whole thing — 161 lines — stays where its author put it; the contents beside it link to each section on GitHub.

verify-pin-bump

Why this skill exists

CLAUDE.md product invariant:

Every model download the engine performs itself goes through download_verified and its pinned SHA-256. Tests cover that function, not new callers that bypass it.

The pin makes KESHA_MODEL_MIRROR safe (a compromised mirror can't silently swap weights) and turns an upstream HuggingFace republish into a deliberate decision.

Until #174, ASR and lang-id downloads skipped verification. Bumping the pin without confirming the new weights are intentional re-opens that gap.

Hard NO

❌ Do NOT comment out download_verified to "make it work".
❌ Do NOT silently update the SHA without checking what changed upstream.
❌ Do NOT use KESHA_MODEL_MIRROR= to bypass — the mirror produces the same hash check.

Procedure

Step 1: Identify which pin failed

The error message names the file. Find its ModelFile entry in rust/src/models/manifest.rs:

grep -n "sha256:" rust/src/models/manifest.rs | head -40
# locate the entry whose URL or rel_path matches the failing download

Step 2: Re-download cleanly

Wipe the existing cache for that file (it may be a partial / corrupted download), then re-download:

rm -f ~/.cache/kesha/models/<subdir>/<file>
KESHA_CACHE_DIR=/tmp/pin-bump ./rust/target/release/kesha-engine install --tts en ru   # bare --tts installs English only
# or, for a single file, curl directly from the URL in models/manifest.rs:
curl -fsSL "<url-from-models-manifest-rs>" -o /tmp/pin-bump-file

Step 3: Compute the actual hash

shasum -a 256 ~/.cache/kesha/models/<subdir>/<file>
# or
shasum -a 256 /tmp/pin-bump-file

Compare to:

The pin in rust/src/models/manifest.rs
The HuggingFace UI's reported SHA (open the file URL, click "Copy SHA")

Step 4: Decide intentional vs incident

Three possible scenarios:

A. Upstream legitimately re-published. Verify by checking the HF repo's commit history:

# the URL in models/manifest.rs already points at /resolve/main/<file> — get the latest commit:
curl -sIL "<url>" | grep -i 'x-repo-commit:'
# then inspect the commit:
gh api "repos/<owner>/<repo>/commits/<sha>" --jq '.commit.message'

Read the full file on GitHub · 161 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.

1mo ago Changed 5d20b20d23c1
1mo ago Changed df4f2296f875
1mo ago Changed d39df141c654
2mo ago Changed · -17 lines · +31 tokens per session 875ccdeab711
2mo ago First seen · 178 lines · 65 tokens per session scan C 72b700f2d445

Subscribe to this mod's changes

verify-pin-bump is a skill published in the GitHub repository drakulavich/kesha-voice-kit (79 stars, last pushed 3d ago), licensed MIT. It adds 96 tokens to every session and 1,648 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Apple Silicon Security asr bun coreml openclaw speech-to-text

verify-pin-bump next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
verify-pin-bumpdrakulavich/kesha-voice-kit	Skill	79	3d ago	MIT	C	96	Claude Code
benchmarksoniqo/speech-swift	Skill	1.3k	yesterday	Apache-2.0	A	0	Claude Code
review-prsoniqo/speech-swift	Skill	1.3k	yesterday	Apache-2.0	A	71	Claude Code
delive-transcript-analyzerXimilalaXiang/DeLive	Skill	260	15d ago	Apache-2.0	A	98	Claude Code, Codex
localvoxtral-doctorT0mSIlver/localvoxtral	Skill	63	today	MIT	A	59	Claude Code
gguf-quantizationsynthetic-sciences/openscience	Skill	4.3k	2d ago	Apache-2.0	A	48	Claude Code, Codex
start-talkingmichael-L-i/cadence-code	Skill	2	3d ago	MIT	A	57	Claude Code, Codex

kesha-voice-kit: Skill for Claude Code