Borrowing it
Nothing to install: this file belongs to fold-run/fold. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/fold-run/fold/main/.claude/skills/conformance/SKILL.mdgit clone --depth 1 https://github.com/fold-run/foldWrote 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/fold-run/fold/conformance)<a href="https://agentmods.dev/skills/fold-run/fold/conformance"><img src="https://agentmods.dev/badge/skills/fold-run/fold/conformance/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/fold-run/fold/conformance"><img src="https://agentmods.dev/badge/skills/fold-run/fold/conformance.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 | $0.00052 | $0.00581 |
| Opus 5.5 | $0.00021 | $0.00232 |
| Sonnet 5.5 | $0.00010 | $0.00116 |
| Haiku 4.5 | $0.00005 | $0.00058 |
Grade A, and why
conformance 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 2mo 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.
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 — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.
fold conformance suite
make conformance runs the official MCP conformance suite through the
gateway fronting the conformance repo's everything-server in passthrough
mode. CI gates merges on 40/40 checks. Requires go, node/npm/npx, git.
The pin lives in scripts/conformance.sh:
CONFORMANCE_COMMIT— conformance repo commit (server fixture)CONFORMANCE_PKG— npm package version (the checker)
The scheduled drift workflow overrides these to main/@latest to catch
upstream movement early; the pin itself is bumped deliberately.
Debugging a failure
- Reproduce locally:
make conformance. Note which check fails. - First question: did the gateway stop being invisible? Run the same
scenario against the upstream directly (the script starts it on
UPSTREAM_PORT, default 3901; gateway on 3902) and diff the behavior.- Differs through the gateway only → a fold bug. Usual suspects: response buffering/rewriting that federation doesn't require, namespacing applied in passthrough mode (it must not be), SSE stream handling, or a minted error replacing a pass-through error.
- Same failure hitting the upstream directly → the suite or fixture moved; this is a pin/drift issue, not a fold bug.
- Environment failures (ports busy, npx cache, node missing) look like
hangs — check
wait_fortimeouts in the script output before suspecting the gateway.
Bumping the pin (deliberate, never drive-by)
- Test the target first without editing anything:
CONFORMANCE_COMMIT=<sha> CONFORMANCE_PKG=@modelcontextprotocol/conformance@<ver> make conformance - If the check count changed (e.g. new checks beyond 40), read the new checks and decide: does fold pass them, or does a gap need closing first? A gap that stays open belongs in README "Not implemented".
- Edit both pin variables in
scripts/conformance.shtogether, update the 40/40 count in CLAUDE.md/CI docs if it changed, and run the full suite once more on the edited script. - The bump gets its own commit with the reason (drift workflow finding, new spec feature, etc.) — per-step approval before committing.
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.
- 2mo ago First seen · 47 lines · 52 tokens per session scan A eb2aec452c26
conformance is a skill published in the GitHub repository fold-run/fold (1 stars, last pushed 12d ago), licensed Apache-2.0. It adds 52 tokens to every session and 581 once invoked, about $0.0002 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.
conformance compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| conformancefold-run/fold | Skill | 1 | 12d ago | Apache-2.0 | A | 52 | Claude Code |
| pi-loop-forensicsdimetron/pi-go | Skill | 222 | 3d ago | MIT | A | 65 | Claude Code, Codex |
| nightly-session-watchdimetron/pi-go | Skill | 222 | 3d ago | MIT | A | 78 | Claude Code, Codex |
| tui-render-debugdimetron/pi-go | Skill | 222 | 3d ago | MIT | A | 33 | Claude Code, Codex |
| extension-uploadagenvoy/Agenvoy | Skill | 526 | 15d ago | AGPL-3.0 | A | 63 | Claude Code, Codex |
| kessoku-dimazrean/kessoku | Skill | 143 | 3d ago | MIT | A | 52 | Claude Code, Codex |
| config-loader-helperpilinux/gorest | Skill | 506 | 16d ago | MIT | A | 25 | Claude Code, Codex |