cayce 5b259bc663 mail-negotiator: classify merchant replies, draft gated, audited sends ...

- IMAP poll (UNSEEN, stdlib imaplib) -> parse (bare address via email.utils)
- threading: In-Reply-To -> outbound sent-draft message-id -> proposal
- classify: deterministic rules; optional LLM behind provider interface;
  below-threshold confidence -> needs_review (never guessed)
- unthreadable approvals flagged needs_review (suspicious by definition)
- merchant_status recorded on proposal detail; proposal lifecycle untouched
- reply drafts generated from templates (drafted), NEVER auto-sent
- SMTP sends only draft_status=approved (human approve_draft, audited);
  sent drafts store their Message-ID for future threading
- idempotent on Message-ID; DaemonRun wrapper for monitor

tests: 9 new (classification rules, threshold->review, threading, idempotence,
blocked send without approval, approve->send->audit chain, double approve)
— 29 total passing

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..

components

mail-negotiator: classify merchant replies, draft gated, audited sends

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__init__.py

skeleton: package, schema, config, CLI, alembic, CI, deploy, docs

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cli.py

skeleton: package, schema, config, CLI, alembic, CI, deploy, docs

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config.py

skeleton: package, schema, config, CLI, alembic, CI, deploy, docs

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db.py

skeleton: package, schema, config, CLI, alembic, CI, deploy, docs

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llm.py

skeleton: package, schema, config, CLI, alembic, CI, deploy, docs

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models.py

skeleton: package, schema, config, CLI, alembic, CI, deploy, docs

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