description: Summarise your Slack activity, surface unanswered messages, and identify what you need to respond to argument-hint: "--since <YYYY-MM-DD|Nd|Nw> --channels <ch1,ch2> --me <slack-username>" allowed-tools: [AskUserQuestion]

Slack Summaries

You summarise the user's recent Slack activity, identify what they need to respond to, and provide a digest of what's been happening across their channels.

Important: MCP Dependency

This skill requires the Slack MCP server to be installed in Claude Code. If any Slack tool call fails with a "tool not found" or connection error, stop immediately and display:

The Slack MCP server is not connected. Please follow the setup guide:
  skills/day-to-day/slack-summaries/references/slack-mcp-setup.md

Then re-run: /slack-summaries

Do not attempt to proceed without MCP access.

Parse Arguments

• --since <value> (optional): How far back to look. Accepts:
  • YYYY-MM-DD (absolute date)
  • Nd (e.g. 3d = last 3 days)
  • Nw (e.g. 2w = last 2 weeks)
  • Default: 7d
• --channels <ch1,ch2> (optional): Comma-separated channel names (without #). Default: all channels the user is a member of.
• --me <username> (optional): The user's Slack display name or username, used to detect mentions and their own messages. If not provided, ask using AskUserQuestion.

Step 0: Verify Access and Resolve Identity

1. Call slack_list_channels to confirm MCP connectivity. If it fails, show the setup message above and stop.

2. If --me was not provided, ask:

   "What is your Slack username or display name? (Used to detect messages mentioning you or threads you need to reply to.)"

3. Compute the since_ts Unix timestamp from --since:

   • Nd: subtract N × 86400 seconds from now
   • Nw: subtract N × 604800 seconds from now
   • YYYY-MM-DD: convert to Unix timestamp at 00:00 UTC

Step 1: Resolve Channel List

If --channels was provided, resolve those channel names to IDs. Otherwise, fetch the full list using slack_list_channels and keep only channels where is_member: true. Exclude archived channels.

Step 2: Part A — Personal Action Items

This section identifies what the user needs to do. Work through these signals:

2a. Direct Messages

Fetch recent DM and group DM conversations since since_ts. For each DM where the last message was sent by someone else (i.e. the user has not replied), flag it as requiring a response.

2b. Mentions

Search for messages that @mention the user across all channels since since_ts using slack_search_messages. For each mention, read the surrounding context and classify:

• Must respond — a direct question or explicit request is addressed to the user
• FYI — informational mention, no action expected

2c. Threads the user is in but hasn't replied to recently

For threads where the user previously participated, fetch replies with slack_get_thread_replies. If someone replied after the user's last message in that thread, flag it as Should acknowledge.

2d. Threads the user started that have new replies

Look through channel history for messages sent by the user (--me). For each thread the user started that has new replies since their last activity, flag it as Should acknowledge.

Step 3: Part B — Channel Digest

For each channel in the resolved list, fetch message history since since_ts using slack_get_channel_history.

For each channel, produce:

• A 2–4 sentence summary of the main topics discussed
• Decisions or conclusions reached (if any)
• Notable links, files, or announcements shared (if any)
• Approximate activity level: low (<10 messages), moderate (10–50), high (>50)

Skip channels with zero messages in the period. For high-volume channels (>100 messages), summarise the most prominent threads rather than every message.

Step 4: Compose and Present Output

Present results in this order and format:

## Slack Summary — [since date] to [today]

### Your Action Items

**Must Respond** (N)
- [#channel or DM] @sender — "message preview up to 120 chars…" _(X hours/days ago)_
  💬 Suggested framing: [one sentence on how to respond]

**Should Acknowledge** (N)
- [#channel] @sender replied in your thread — "preview…" _(X hours/days ago)_

**FYI** (N)
- [#channel] @sender mentioned you — "preview…" _(X hours/days ago)_

---

### Channel Digest

**#channel-name** · moderate activity
2–4 sentence summary. Decisions: ... Links: ...

**#channel-name** · low activity
2–4 sentence summary.

Rules

• Never fabricate or paraphrase messages in a way that changes their meaning. Use exact quotes for message previews.
• Keep message previews to the first 120 characters.
• Omit channels with no activity in the period — don't list them as empty.
• Omit action item categories that have zero items.
• If there are no action items at all, state: "No action items found for this period."
• Do not surface bot messages or automated notifications in action items — only messages from real humans.