docs(07): create phase plan for Main Session Skill

- 1 plan (07-01-PLAN.md) — creates session/SKILL.md
- Single-file SKILL.md at ~/.hermes/skills/ngn-agent/session/
- Covers SKIL-04 with 7-step lifecycle procedure
- All 14 locked decisions (D-01 through D-14) embedded
- Deferred ideas scoped to Phase 8

.planning/ROADMAP.md

@@ -63,11 +63,14 @@ Plans:
 **Requirements**: SKIL-04
 **Success Criteria** (what must be TRUE):
   1. Agent detects similar previous sessions via hindsight on session start
-  2. Agent loads DEFAULT_REPOS into workspace on session init
-  3. Agent creates a Jira ticket for the session task automatically
-  4. Agent loads relevant Confluence docs for context
-  5. Agent updates docs and Jira ticket at session end with results summary
-**Plans**: TBD
+  2. Agent prompts for Jira ticket creation (Task type, configurable project, optional epic)
+  3. Agent loads relevant Confluence docs for context (searched by tag)
+  4. Agent prompts for Jira/Confluence updates at session end
+  5. Session summary auto-saved to hindsight (no prompt)
+**Plans**: 1 plan
+
+Plans:
+- [ ] 07-01-PLAN.md — Main Session Skill: create session/SKILL.md with full init→work→close lifecycle
 
 ### Phase 8: Cron Reporting
 **Goal**: Daily operational reporting with stale session archiving and Jira integration
@@ -91,5 +94,5 @@ Plans:
 | 4. Skills & Integrations | v1.0 | — | Complete | 2026-06-14 |
 | 5. Hindsight Memory Provider | v1.1 | 0/1 | Not started | - |
 | 6. Default Repos & SSH Mount | v1.1 | 0/1 | Not started | - |
-| 7. Main Session Skill | v1.1 | 0/TBD | Not started | - |
+| 7. Main Session Skill | v1.1 | 0/1 | Not started | - |
 | 8. Cron Reporting | v1.1 | 0/TBD | Not started | - |