purge-anthropies

name	purge-anthropies
description	Use when the user asks to purge anthropies, strip Co-Authored-By Claude, strip Generated-with banners, inspect owned files for vendor marks, clean hard-bound C2PA metadata from owned png/jpg/svg (and other supported files), or runs /purge-anthropies or /anthropies. Does not claim official watermark removal.

Purge Anthropies

Restore clean title in Outputs the user already owns. The Claude text mark is a SynthID-class keyed sampler. It is the wording. Hidden-character strip does not touch it.

humanize is title restoration: a best-effort wording rewrite on a non-origin model. Residual statistical risk remains. print-prompt does not destamp. This is not an official-kill.

Hard rules

• Do not rewrite with Claude, Gemini, or any origin/watermarked vendor. That re-stamps the mark.
• Do not claim official-detector failure. There is no public Claude detector.
• Do not synonym-swap in place. That leaves H-grams intact.
• Deterministic clean first. Humanize second.

Procedure

1. Resolve the target: path, selection, or commit message the user named.

2. Prefer the local HTTP service for inspect/clean.

ANTHROPIES_SERVICE_URL defaults to http://127.0.0.1:8765. The process that owns FileSystem is anthropies serve (loopback 127.0.0.1:8765 unless the operator passed --host / --port):

npx anthropies serve

From this repo after pnpm build: node dist/cli.js serve.

Health-check first:

: "${ANTHROPIES_SERVICE_URL:=http://127.0.0.1:8765}"
curl -sS -f "$ANTHROPIES_SERVICE_URL/health"

Expected: {"ok":true,"version":"0.3.0"}. If health fails, say so. Do not invent a successful HTTP result. If the operator required the service, stop and report the failure. Otherwise use the local CLI fallback:

npx anthropies clean --in-place <path>

If the package is not installed, run it from the repo after pnpm build: node dist/cli.js clean --in-place <path>.

When health succeeds, POST base64. If ANTHROPIES_SERVER_API_KEY is set, add -H "Authorization: Bearer $ANTHROPIES_SERVER_API_KEY":

file_b64=$(base64 < <path> | tr -d '\n')
name=$(basename <path>)

# inspect → { ok, kind, report }
curl -sS -X POST "$ANTHROPIES_SERVICE_URL/inspect" \
  -H "Content-Type: application/json" \
  -d "{\"file\":\"$file_b64\",\"name\":\"$name\"}"

# clean → { ok, kind, report, cleaned }  (cleaned is base64; Layer A / hard-bound metadata only)
curl -sS -X POST "$ANTHROPIES_SERVICE_URL/clean" \
  -H "Content-Type: application/json" \
  -d "{\"file\":\"$file_b64\",\"name\":\"$name\"}"

There is no HTTP /humanize. Official stays unavailable unless ANTHROPIC_DETECT_URL is set. This run does not prove the official Claude text detector will fail.

3. Classify the file.

   • Commit message / PR body: stop after clean. Trailers and banners are the mark.
   • Code: humanize comments, docstrings, and free strings only. Do not rename public APIs. Do not rewrite lockfiles, generated stubs, or snapshots.
   • Prose / markdown: humanize the prose outside fences. Leave fenced code, tables of facts, URLs, and citations.

4. Humanize without the origin model. Humanize is CLI-only.

If the current host is Claude or Gemini, do not rewrite in this session. Run:

ANTHROPIES_REWRITE_BACKEND=print-prompt npx anthropies humanize <path>

print-prompt prints a rewrite prompt. It does not destamp. Then execute that prompt on a local unmarked model (Ollama / local Llama / Qwen / Mistral / DeepSeek with watermarking off). Optional:

ANTHROPIES_REWRITE_BACKEND=ollama ANTHROPIES_REWRITE_MODEL=llama3.2 npx anthropies humanize --in-place <path>

If the current host is already unmarked (Grok, local open-weight, etc.), rewrite in-session:

• Change clause order, sentence boundaries, discourse markers, and function words.
• Target well under 50% surviving 5-grams.
• Keep facts, numbers, names, URLs, and code fences.
• For code, rewrite comment wording only unless the user opted into local-identifier rename.

5. Report to the user:

• what deterministic marks were removed
• whether inspect/clean ran over HTTP (ANTHROPIES_SERVICE_URL) or the local CLI fallback
• whether a rewrite ran, and on which backend
• residual risk: statistical marks may remain; title restoration is best-effort; this is not an official-detector certificate and not an official-kill

Do not

Move	Why
Ask Claude to "make this unmarked"	Re-stamps the same keyed sampler
Light copy-edit / prettier-only	H-gram islands survive
Touch lockfiles, go.sum, protobufs	No free tokens; high breakage
Patch Claude Code request apostrophes	Different problem (outbound client steg)
Claim official-detector failure	Official stays unavailable unless a URL is set

Additional resources

• references/mark.md — how the mark works
• Start the service: npx anthropies serve (default http://127.0.0.1:8765)
• Discover routes: GET $ANTHROPIES_SERVICE_URL/openapi.json
• Repo CLI: npx anthropies --help or node dist/cli.js --help