PaperbackWriter

End-to-end first-draft orchestrator. Takes an **external target folder path** (the paper lives outside this repo). Sets up missing scaffold pieces, then runs the role agents in two phases: Phase 1 (parallel) writes related-lit and model-prose. Phase 2 (sequential) writes results-prose, then optional discussion, then intro (incl. closing if warranted), then abstract last. Pauses for review between phases. Use when the user says "draft <path>", "draft `~/Documents/papers/foo`", or similar.

Verify EVERY entry in a paper's `refs.bib` against Crossref's canonical record. Catches wrong DOIs, years, volumes, issues, pages, venues, and author lists; flags missing DOIs with the record to add; and detects when a "working paper" now has a published version. **Report-only — never edits the .bib.** **Does not check math or prose.** Use before any "final" compile / submission, or whenever the user says "check the citations", "verify the bib", "crossref the references", "are the citations right".

Compile a paper in `<target>/tex/` to PDF. Runs pdflatex → bibtex → pdflatex → pdflatex, parses the .log for errors, surfaces a focused error report. Use whenever the user says "compile", "build the PDF", or after any non-trivial edit to the .tex sources.

Bootstrap a new paper. Asks for an external target path, creates the directory, copies the scaffold, and walks the user through filling in the brief. Use when the user says "new paper", "start a paper", "I want to write a paper", "set up a new paper", or when they're new to the repo and need onboarding. This is the **first-run entry point**.

Audit the current draft for craft and integrity violations. Runs `integrity-gatekeeper` and `exposition-gatekeeper` agents in parallel, synthesizes findings into Critical / Important / Minor. **Reports only — never auto-fixes.** **Does not check math.** Use after any substantive draft pass.

Tighten the "why does this matter" thread running through abstract + intro P1-P2. Targets motivation density, not prose polish. Use after the first intro draft if motivation is weak.

Purge pipeline-internal references from the user's pre-baked proofs in `<target>/proofs/`. Outputs a `_cleaned/` directory + a diff report. **Never touches the math itself** — only removes meta-prose referring to the proof-checking pipeline (e.g., "in iteration 3 of the verification", "as shown in the previous step of the pipeline"). The user reviews the diff and decides whether to swap in the cleaned files.

Draft or revise the Related Literature section. Uses a verified citation universe (`refs.bib` + `brief.md` anchors + `references/pdfs/`). **Never invents citations.** Marks unresolved claims with `[CITATION NEEDED]`. Use when the user says "write the related lit", "do a lit review pass", or after the main results are stable.