feat: relationship closing — office-hours adapts to repeat users (v0.16.2.0) (#937)

* fix: sync package.json version with VERSION file

package.json was 0.15.15.0 while VERSION was 0.15.16.0, causing
gen-skill-docs freshness check test failures.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: add builder profile helper for office-hours relationship closing

New bin/gstack-builder-profile reads ~/.gstack/builder-profile.jsonl and
outputs structured summary (tier, signals, resources, topics). Single
source of truth for all closing state — no separate config keys or logs.

Uses bun-based JSONL parsing pattern from gstack-learnings-search.
Graceful fallback to introduction tier if bun unavailable or file missing.

26 unit tests covering tier computation, signal accumulation, cross-project
detection, nudge eligibility, resource dedup, and malformed JSONL handling.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: relationship closing — office-hours adapts to repeat users

The office-hours closing now deepens over time instead of repeating
the same YC plea every session.

Four tiers based on session count:
- Introduction (session 1): full YC plea + founder resources
- Welcome Back (sessions 2-3): lead with recognition, skip plea
- Regular (sessions 4-7): arc-level callbacks, signal visibility,
  builder-to-founder nudge, auto-generated journey summary
- Inner Circle (sessions 8+): the data speaks

Key design decisions (from CEO + Eng + Codex + DX reviews):
- Single source of truth: one builder-profile.jsonl, no split-brain state
- Lead with recognition on repeat visits (DX: magical moment hits immediately)
- Narrative arc journey summary, not data tables
- Tone examples per tier to prevent generic AI voice
- Global resource dedup (low-sensitivity video watch history)
- Migration merges per-project resource logs into builder profile

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: bump version and changelog (v0.16.2.0)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## [0.16.2.0] - 2026-04-09
+
+### Added
+- **Office hours now remembers you.** The closing experience adapts based on how many sessions you've done. First time: full YC plea and founder resources. Sessions 2-3: "Welcome back. Last time you were working on [your project]. How's it going?" Sessions 4-7: arc-level callbacks across your whole journey, accumulated signal visibility, and an auto-generated Builder Journey narrative. Sessions 8+: the data speaks for itself.
+- **Builder profile** tracks your office hours journey in a single append-only session log. Signals, design docs, assignments, topics, and resources shown, all in one file. No split-brain state, no separate config keys.
+- **Builder-to-founder nudge** for repeat builder-mode users who accumulate founder signals. Evidence-gated: only triggers when you've shown 5+ signals across 3+ builder sessions. Not a pitch. An observation.
+- **Journey-matched resources.** Instead of category-matching from the static pool, resources now match your accumulated session context. "You've been iterating on a fintech idea for 3 sessions... Tom Blomfield built Monzo from exactly this kind of persistence."
+- **Builder Journey Summary** auto-generates at session 5+ and opens in your browser. A narrative arc of your journey, not a data table. Written in second person, referencing specific things you said across sessions.
+- **Global resource dedup.** Resource links now dedup globally (not per-project), so switching repos doesn't reset your watch history. Each link shows only once, ever.
+
+### Fixed
+- package.json version now stays in sync with VERSION file.
+
 ## [0.16.1.0] - 2026-04-08
 
 ### Fixed