scrip-harness 0.4.0

Runnable AGENT.md compile loop for scriptorium: drives `scrip` via subprocess + Claude. Not part of the deterministic scrip core.

scrip-harness — the runnable compile loop

The deterministic scrip keeper does staleness, provenance, and queries. It never calls a model. scrip-harness is the optional judgment layer that makes the AGENT.md COMPILE step runnable: it asks Claude to synthesize a wiki page from a source, then hands every verifiable step back to scrip.

The dependency points one way only: the harness depends on scrip (and the Anthropic SDK); scrip depends on neither. Removing this directory leaves a fully valid, fully deterministic vault and CLI behind.

How a compile runs

scrip-harness compile <slug> (for vault/raw/<slug>.md):

1. Draft — Claude (claude-opus-4-8, adaptive thinking, structured output) returns a DraftPage: a title, markdown prose with footnote markers [^a1], [^a2], …, and one verbatim quote per marker.
2. Mint — each quote goes through scrip anchor, which fails the compile if the quote isn't present in the source or isn't unique. A hallucinated or paraphrased quote cannot get past this step.
3. Scaffold + fill — scrip new writes the frontmatter; the harness fills the body with the prose + the minted footnote definitions.
4. Stamp + verify — scrip stamp records provenance hashes; scrip verify proves every citation resolves. If verify fails, the compile errors out rather than leaving a stamped-but-broken page.

So the model owns what to say; scrip owns what is true on disk.

How an extract runs

scrip-harness extract <slug> (for vault/raw/<slug>.md):

1. Draft — Claude returns a DraftExtraction: structured claims, each with a verbatim quote, a subject/predicate/object triple, and a polarity.
2. Mint + append — the claims go to scrip fact add --stdin, which verifies every quote (minting anchors), assigns ids and timestamps, skips exact duplicates, and appends all-or-nothing under the write lock.
3. Retry — if quotes come back BROKEN/AMBIGUOUS, the failures go back to Claude for one replacement per failure (lengthened until unique, or an empty quote to drop the claim); bounded retries, then the extract fails cleanly.
4. Stamp + verify — scrip stamp vault/facts/_meta.yaml, then scrip verify; contradiction candidates from scrip query contradictions are surfaced for the operator to RECONCILE per AGENT.md.

How a promote runs

scrip-harness promote <slug> (for a compiled vault/wiki/<kind>s/<slug>.md):

1. Score — scrip similar ranks existing pages by overlap (shared sources + title tokens + derived tags) with the candidate, excluding itself.
2. Band the top score: ≥ --merge-threshold (0.5) → merge into it, deterministically (no model); < --keep-threshold (0.25) → keep the page as its own; in between → Claude decides merge-vs-keep over the small candidate set (the only model call in PROMOTE).
3. Merge — append the candidate into the target (its [^a1].. footnotes renumbered to avoid collision), union the derived-from, record the absorbed id in supersedes, delete the absorbed page, then scrip stamp + scrip verify. --dry-run prints the decision and mutates nothing.

Install & run

Both packages are on PyPI. scrip-harness bundles scriptoria as a dependency and drives it through its own interpreter, so it is self-sufficient — install scriptoria as a tool too only if you want the scrip command on PATH for direct use:

uv tool install scrip-harness            # this package → `scrip-harness` (pulls scriptoria)
uv tool install 'scriptoria[ingest]'     # optional: `scrip` on PATH + HTML/PDF ingest
export ANTHROPIC_API_KEY=...              # the harness calls Claude; scrip never does

scrip-harness compile article            # synthesize + verify a page from raw/article
scrip-harness extract article            # pull claims into facts/
scrip ingest <url> --slug article        # bring a source in (needs the install above)

(From a checkout, uv tool install ./scrip and uv tool install ./harness install the local versions instead.)

Develop / test

cd harness && uv run pytest        # hermetic: the model is stubbed; scrip runs for real

The tests inject a stub draft function (no network, no API key) and drive the real scrip subcommands over a temp vault, asserting the result is stamped and verified.

Scope & limits (v1)

• Covers COMPILE (one source → one wiki page), EXTRACT (one source → claims in facts/, with the bounded quote-retry loop), and PROMOTE (score → merge/keep, model only in the middle band). Entities/edges go through scrip fact add --table entities|edges by hand; RECONCILE (contradictions) is not yet automated here — drive it with scrip directly per AGENT.md.
• Single source per page/extract; merge is append (not re-synthesis). Multi-source synthesis, and adopting the quote-retry loop in COMPILE too, are future work.