Fix daily content cron: Claude response truncated by low max_tokens

[neverpeakev]

Summary

Bump MAX_TOKENS in lib/social/post-generator.ts from 1500 → 4000 so Claude Opus 4.7 has enough budget to emit a full caption inside the JSON envelope without truncation.

Diagnosis

Today's /api/social/fb-daily-generate cron failed at 14:00:42 UTC with no row inserted into generated_posts. Vercel runtime log:

[fb-daily-generate] failed at stage=generate:
generateDailyPost failed after 3 attempts.
Last error: not valid JSON (first 200 chars: {"angle_tag":"carpool-line-snack-pouch-rec","content_format":"anecdote", ... "eligibility punct)
Last raw response: ... "caption":"A

The response was always cut off mid-caption value, so every retry hit the same JSON.parse failure. The schema in GeneratedPostSchema allows captions up to 2000 chars (~600 tokens), and once the model picks a chatty "anecdote"-format draft the rest of the JSON envelope (display, body, rationale, etc.) consumes the remaining ~900 tokens before caption can fully emit. 1500 was always too tight; today's run finally surfaced it.

Fix

• lib/social/post-generator.ts: MAX_TOKENS = 4000 with an inline note explaining the headroom math.

Secondary finding (not in this PR)

Every row from 2026-06-19 → 2026-06-24 shows status = 'fb_published' with ig_published_at = null and no ig_failed rows. The IG mirror cron returns 200 daily but isn't reaching the publish call — it's exiting silently in the early bail-out path (nothing to mirror / auth/page-context). Yesterday's 14:15:08 UTC invocation has no log lines beyond the request itself.

Details in docs/routine-logs/health-2026-06-25.md. Logged here so it's not lost — a follow-up routine run should diagnose (likely candidates: expired META_MARKETING_API_TOKEN, IG account unlinked, or an unintended status mutation breaking listPendingIgMirror's .eq("status", "fb_published") filter).

Test plan

• Merge → wait for next 14:00 UTC fire, or trigger manually:
  curl -X POST https://momfluence.app/api/social/fb-daily-generate -H "Authorization: Bearer $CRON_SECRET"
• Confirm a new row appears in generated_posts with status='fb_published' and a valid fb_post_id.
• Separately diagnose the IG mirror silent-stall (out of scope here).

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Generated by Claude Code

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Project	Deployment	Actions	Updated (UTC)
momfluence	Ready	Preview, Comment	Jun 25, 2026 2:51pm
momfluence-platform	Ready	Preview, Comment	Jun 25, 2026 2:51pm