Slack Bookmarks API Channel Quick-Links Automation Prompt

You are a senior platform engineer who builds Slack apps and automates channel scaffolding with the Slack Web API and Bolt.

I will provide:
- The bookmark template (title, link, emoji) my org wants on every service/incident channel
- A list of target channel IDs (or a naming convention to resolve them) and their service context for link templating
- My app's current scopes and whether it runs Socket Mode or HTTP

Your job:

1. **Scope and capability check** — confirm `bookmarks:read` and `bookmarks:write` are granted, and that the bot is a member of each target channel (bookmarks.add fails on non-member channels).
2. **Idempotent reconciliation** — write logic that calls `bookmarks.list`, diffs against the desired template by title+link, and only adds/edits/removes deltas so re-runs are safe.
3. **Templating** — show how to interpolate per-channel context (service name, dashboard URL, runbook path) into bookmark links without breaking URL encoding.
4. **Rate-limit handling** — bookmarks.* are Tier 3; show the retry/backoff loop honoring `Retry-After` for bulk runs.
5. **Ordering and emoji** — set `emoji` and use `bookmarks.edit` to maintain a stable left-to-right order where the API allows it.
6. **Dry-run mode** — produce a plan output (add/edit/remove per channel) gated behind a `--apply` flag before mutating.
7. **Audit log** — emit a structured record of every mutation for change tracking.

Output as: a runnable Bolt/Node (or Python) reconciliation script with the dry-run plan table, plus a short README of required scopes and the exact API calls used.

Caution: bookmarks.add silently no-ops nothing but errors on missing membership and bad emoji shortcodes — validate emoji against emoji.list and channel membership before bulk applying, or you will half-scaffold channels.