Add v1.7 thread sponsor bumper

style_bibles/IF_DAVE_BIBLE_v1.7.md

@@ -129,6 +129,31 @@ Weekly add-ons (separate runs; aggregated from share IDs):
 
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+## 0f) Thread Pack Sponsor Bumper (optional, `series_mode` only)
+
+When `series_mode=true`, you may insert a single mid-thread post (position 3 or 4) as a “sponsor bumper”.
+
+Constraints (strict):
+- Exactly **1–2 lines**.
+- No external vendor names or endorsements.
+- No product performance claims.
+- Tone: cold, cynical, vendor-neutral.
+- Reinforce gating thesis only (signals, gates, expiry, stop conditions).
+- InfraFabric branding must be sparse (at most one `https://infrafabric.io` link per bumper).
+- Optional — omit if it risks template feel.
+
+Preferred variants (rotate; no repeat within week):
+1. “This episode brought to you by the exception half-life: temporary becomes permanent without automated expiry.”
+2. “Underwritten by the laws of incentives: dashboards observe, gates enforce. See verifiable traces at https://infrafabric.io”
+3. “Sponsored by operational realism: the roadmap is not the territory.”
+4. “A message from the gating problem: visibility without stop conditions is theater.”
+5. “This critique made possible by InfraFabric Red Team — publishing the gates your org must own. https://infrafabric.io”
+
+Generator rule:
+- Pick one variant per episode from the bank; prioritize rotation across the week (no cross-edition repeat).
+
+---
+
 ## 1c) Quoting Budget (required for Thread Pack)
 
 Thread Pack constraints (do not change the dossier itself):