skills: add glpi-* family (solve, followup, sweep, list, create)

GLPI helpdesk workflow skills written against the portable
tools/glpi/ tooling (session-init.sh, ticket-list.sh, ticket-create.sh),
cross-linked via [[glpi-*]]:

- glpi-solve    — close a ticket by setting status Solved (5); GLPI auto-closes
- glpi-followup — add a followup via the top-level /ITILFollowup endpoint
- glpi-sweep    — read-only hunt for done-but-open tickets needing Solve
- glpi-list     — query tickets by status/recency
- glpi-create   — open a new ticket

Core rule encoded: completing work means setting status Solved, not just
posting a resolution followup (a followup documents; only Solved auto-closes).

Note: illustrative examples in the bodies are USC-flavored (M2M / helpdesk
ticket numbers) and can be genericized in review if preferred.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019GjBgrb9tHgvq414Fqj37c

skills/glpi-sweep/SKILL.md

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+# Skill: glpi-sweep — Find Done-But-Open Tickets
+
+> Read-only sweep for tickets that are finished in reality but still sitting open in
+> GLPI (never moved to Solved). Surfaces the exact miss Jason caught on 2026-07-20
+> (M2M #2607200002 and the Brad ticket had resolution followups posted but were left
+> open). For each one that's genuinely done, close it out with **[[glpi-solve]]**.
+
+## When to use
+
+- Periodic hygiene pass (e.g. before a weekly update or month-end).
+- After a burst of ticket work, to catch any you resolved-in-followup but never Solved.
+
+## Why this exists
+
+Posting an `/ITILFollowup` documents work but does **not** change status. Tickets only
+auto-close once set to **Solved (status 5)**. Anything left at New/Processing/Pending
+stays open indefinitely. This sweep finds those.
+
+## Procedure
+
+### 1. List still-open tickets by status
+
+```bash
+GLPI=~/.config/mosaic/tools/glpi
+"$GLPI/ticket-list.sh" -s new        -f table
+"$GLPI/ticket-list.sh" -s processing -f table
+"$GLPI/ticket-list.sh" -s pending    -f table
+```
+
+(GLPI status IDs: 1 New · 2/3 Processing · 4 Pending · 5 Solved · 6 Closed.)
+
+### 2. Triage
+
+For each open ticket, judge whether the underlying work is actually finished — check
+its latest followups and cross-reference brain tasks / recent work. Read-only here;
+change nothing yet.
+
+Reasonable "probably done" signals:
+
+- A resolution/root-cause followup already posted, but status never advanced.
+- The related brain task is `done`, or the fix shipped and was confirmed.
+- Requester confirmed resolution but the ticket was never Solved.
+
+### 3. Present the candidates
+
+List them for review before touching anything — never bulk-solve blindly:
+
+```
+Open tickets that look resolved:
+- #<id> "<title>" — <why it looks done> → glpi-solve?
+```
+
+### 4. Close out the confirmed ones
+
+For each ticket the user (or clear evidence) confirms is done, run **[[glpi-solve]]**
+(optionally **[[glpi-followup]]** first if a closing note is warranted).
+
+## Guardrails
+
+- Read-only until a ticket is confirmed done — do not auto-solve on a guess.
+- Never echo GLPI tokens.
+- Set **Solved (5)**, never Closed (6) — GLPI auto-close owns that transition.