fix: add vetting phase to skill discovery to filter one-off activities

[steve-calvert-glean]

Summary

• Adds a critical vetting phase to the skill discovery process
• Filters out one-time events (team mergers, migrations, reorgs)
• Prioritizes skills by cumulative value (frequency × time saved)
• Shows vetting work including rejected candidates and reasons

Problem

The discover command was suggesting skills for activities like:

• Team merger channel migrations (one-time organizational event)
• Office move coordination (happens once every few years)

These aren't good skill candidates because they won't recur.

Solution

Added a structured vetting process that evaluates each candidate:

1. Recurrence Test: Will this person do this again?
2. Frequency Threshold: Daily > Weekly > Monthly > Reject
3. Cumulative Value: frequency × time saved
4. Disqualifying Signals: Explicit list of patterns to reject

The agent now outputs a "Rejected Candidates" section showing what was filtered and why.

Examples

Good candidates (include):

• Daily standup prep (5 min × 5 days = 25 min/week)
• PR review checklist (10 min × 10 PRs = 100 min/week)

Bad candidates (reject):

• Team merger channel migration (2 hours, once)
• Annual performance review (1 hour, once/year)

Test plan

• Run /glean-skills:discover and verify it shows vetting work
• Check that one-off activities are in "Rejected Candidates"
• Verify recommendations focus on recurring patterns

🤖 Generated with Claude Code