IMAP

When to Use#

Use this skill when the user needs to inspect or operate an IMAP mailbox across Gmail, Fastmail, ProtonMail Bridge, Exchange-compatible gateways, or self-hosted mail servers.

Activate it for inbox search, unread triage, header and body fetches, attachment handling, folder mapping, or incremental mailbox sync when correctness matters more than quick ad hoc scraping.

Architecture#

Memory lives in ~/imap/. If ~/imap/ does not exist, run setup.md. See memory-template.md for the default structure and file templates.

text

~/imap/
├── memory.md       # activation defaults, mutation policy, preferred reporting style
├── accounts.md     # mailbox-specific endpoints, auth notes, and server capabilities
├── folder-map.md   # canonical folder mapping and provider quirks
├── sync-state.md   # UIDVALIDITY, last UID, MODSEQ, and sync checkpoints
└── playbooks.md    # saved mailbox workflows and reusable search recipes

Quick Reference#

Use these files when the current mailbox task needs more detail than the core rules provide.

TopicFileSetup and activation defaultssetup.mdMemory and file templatesmemory-template.mdSession planning and discoverysession-strategy.mdSearch and fetch patternssearch-and-fetch.mdState, flags, and sync rulesstate-and-flags.mdAttachment and MIME handlingattachments.mdFailure diagnosis and provider quirkstroubleshooting.md

Core Rules#

1. Discover mailbox capabilities before making assumptions#

• Identify server capabilities, namespace layout, delimiter behavior, and special-use folders before building commands or interpreting results.
• Check whether the server supports features such as UIDPLUS, CONDSTORE, QRESYNC, MOVE, or XLIST replacements.
• Folder names, archives, and flag behavior vary by provider, so do not hard-code Gmail semantics onto every mailbox.

2. Default to read-safe operations unless the user clearly wants mutation#

• Start with safe inspection patterns such as capability discovery, folder listing, EXAMINE, header fetches, and targeted body retrieval.
• Treat delete, move, copy, expunge, and bulk flag updates as mutating actions that require either explicit user approval or a previously confirmed standing policy.
• If the user only asked to inspect or summarize mail, do not silently mark messages seen or alter mailbox state.

3. Use UIDs and durable sync markers, not volatile sequence numbers#

• Sequence numbers shift as mail arrives or is removed, so they are unsafe for persistent tracking.
• For repeatable workflows, store UIDVALIDITY, last processed UID, and when available HIGHESTMODSEQ or related sync checkpoints in ~/imap/sync-state.md.
• If UIDVALIDITY changes, treat prior cursors as invalid and rescan instead of trusting stale state.

4. Fetch the minimum data that answers the question#

• Start with folder listing, counts, flags, and envelope or header data before downloading full bodies or attachments.
• Escalate to body sections, MIME structure, or attachments only when the user actually needs that detail.
• Smaller fetches reduce latency, bandwidth, and the chance of dragging sensitive content into unnecessary downstream processing.

5. Search with explicit server-side filters and report what they mean#

• Prefer precise IMAP search constraints such as date ranges, sender, subject fragments, flags, size limits, or UID windows over broad mailbox scans.
• Be clear about whether the server search is header-only, text-oriented, charset-sensitive, or provider-specific in its matching behavior.
• When search semantics are ambiguous, explain the limitation and offer a narrower or confirmatory pass.

6. Treat MIME and attachments as structured data, not opaque blobs#

• Read BODYSTRUCTURE or equivalent metadata before assuming where text lives or which parts are attachments.
• Distinguish inline parts from downloadable attachments, decode filenames safely, and preserve charset and transfer-encoding details.
• Avoid downloading large attachments unless needed, and report part identifiers, sizes, and media types first when triaging.

7. Keep credentials out of skill memory and scope network use tightly#

• Store only non-secret connection notes, capabilities, and workflow preferences under ~/imap/.
• Never ask the user to paste account passwords into memory files; use existing local auth flows, app passwords, OAuth-backed bridges, or other secure runtime mechanisms the environment already supports.
• Restrict network activity to the user-configured IMAP endpoint needed for the mailbox task at hand.

IMAP Traps#

• Treating message sequence numbers as stable identifiers -> follow-up fetches hit the wrong message after mailbox changes.
• Marking mail seen during a read-only review -> the user loses unread state without asking for it.
• Downloading entire folders to answer a narrow question -> latency, bandwidth, and privacy costs rise for no gain.
• Ignoring UIDVALIDITY resets -> incremental sync silently skips or duplicates messages.
• Assuming every server supports MOVE, IDLE, or Gmail-style special folders -> commands fail or behave differently across providers.
• Parsing attachments without checking MIME structure first -> inline parts, filenames, or charsets get misread.

External Endpoints#

EndpointData SentPurposeUser-configured IMAP or IMAPS serverauthentication material handled by the runtime, mailbox commands, requested headers, bodies, flags, and attachmentslist folders, search messages, fetch content, and update mailbox state when approved

No other data is sent externally.

Security & Privacy#

Data that stays local:

• Activation defaults, provider quirks, sync checkpoints, and reusable playbooks stored under ~/imap/
• Mailbox notes the user explicitly wants remembered for future sessions

Data that leaves your machine:

• Only the IMAP requests needed to talk to the configured mailbox server
• Message metadata, bodies, or attachments fetched from that mailbox when the current task requires them

This skill does NOT:

• store mailbox passwords or OAuth tokens in ~/imap/
• assume mutating mailbox access is allowed by default
• send mailbox content to undeclared third parties
• treat sequence numbers as durable sync state

Trust#

By using this skill, data is exchanged with the user-configured mail provider or IMAP bridge. Only use it with mailbox systems and local credential flows the user already trusts.

Related Skills#

Install with clawhub install <slug> if user confirms:

• api - use when the mailbox task is really an API integration or authenticated service wrapper problem.
• http - use when the work is request shaping, header debugging, or protocol inspection outside an IMAP session.
• json - use when mailbox results need structured transformation, normalization, or downstream machine-readable output.
• code - use when the user needs a full implementation, parser, or sync worker built and verified end to end.
• bash - use for shell-first mailbox tooling, local automation, and repeatable command wrappers.

Feedback#

• If useful: clawhub star imap
• Stay updated: clawhub sync