dsh-plugin-mail-triage

dsh-plugin-mail-triage

Mail triage and safe cleanup for DeepSeek Harness.

Read-only incremental triage first, an explicit approval second, and only then a move to Trash. Reading and writing are separate tools with separate code paths, and there is no expunge anywhere in this plugin.

简体中文说明见 README.zh.md.

Pipeline

IMAP (incremental, metadata + a short body snippet)
  → hard-protection rule layer (OTP, invoices, attachments, phishing, school/official, sent, whitelist)
  → optional local Ollama classification
  → green (delete candidate) / yellow (needs review) / red (never auto-deleted)
  → Markdown triage report + local label list
  → manifest with a content hash
  → approval card
  → MOVE to the Trash mailbox
  → audit log

The first run only reads and labels. Nothing in the mailbox changes.

Tools

Tool	Access	Purpose
mail_triage_accounts	metadata	list, import_thunderbird, set_secret, test, remove
mail_triage_scan	read-only	incremental scan, rules, local model, report
mail_triage_review	local	read the yellow queue / record verdicts
mail_triage_plan	read-only	build the delete list and manifest
mail_triage_apply	write	after approval, move to Trash
mail_triage_audit	read-only	audit log, reports, manifests

Credentials come from Thunderbird

No manual typing: the plugin decrypts the local Thunderbird profile (key4.db + logins.json) and stores the account secrets in the DSH credential store. Decryption happens locally with node:sqlite and node:crypto — no Python, no NSS DLL, no native modules. Nothing is uploaded, and nothing is written to the workspace in plaintext: if the host exposes no credential service, saving a secret fails with an explanation instead of falling back to a file.

Install

In the DSH UI, Plugins → + Add plugin:

github:wth373737/dsh-plugin-mail-triage

imapflow (the single dependency, pure JavaScript) is installed by pnpm.

Safety properties enforced in code

• The rule layer can only protect; it never creates a deletion on its own.
• Low confidence, an invalid model schema, a timeout or a missing model all fall to the yellow bucket.
• OTP, invoice, phishing, attachment, official, academic, personal and sent/draft categories are never auto-deleted.
• Deletion is MOVE to \Trash; if no Trash mailbox resolves, the plugin refuses instead of guessing.
• The manifest carries a content hash that is re-verified before execution.
• Every move is audited.
• Passwords and OAuth tokens live in the Host credential store only. With no credential service available the plugin refuses to store or read one rather than writing a plaintext file next to the reports.

State

Workspace .mail-triage/: config.json, state.json (cursors), labels.jsonl, verdicts.jsonl, audit.jsonl, manifests/, reports/. Plain text, yours to inspect or delete.

Development

npm test    # offline smoke tests: rules, decision matrix, schema validation, decoding, store, report

Known limitations

• If a Gmail account's Thunderbird Google grant cannot be refreshed, store a 16-character app password with set_secret.
• Non-UTF-8 bodies (e.g. windows-1256) render as mojibake in snippets; classification still works, the summary text is just ugly.
• When a header block exceeds 8 KB (long DKIM/ARC chains) the body is fetched a second time; if it is still unavailable the snippet stays empty.
• If a Thunderbird OAuth grant has expired, the plugin reports it honestly: sign in again in Thunderbird, then re-run import_thunderbird.
• Only INBOX is scanned by default (configurable); sub-folders are not expanded.
• node:sqlite needs Node 22.5 or newer. The runtime bundled with DSH satisfies this; on an older host the plugin fails to load instead of degrading.
• A secret typed into set_secret, and a Thunderbird primary password typed into import_thunderbird, become part of the conversation transcript. Prefer import_thunderbird when Thunderbird already holds the password.
• A plaintext .mail-triage/secrets.json left by a build before 1.0.2 is moved into the credential store and deleted the next time mail_triage_accounts runs. If the service is unreachable the file is left alone and the tool says to delete it by hand.

Development note

After editing plugin code the Host still holds the previous module instance: toggle the plugin off and on in the Plugins panel to load the new code (no full restart needed).

License

MIT © 2026 wth373737