diff --git a/domains/ai-alignment/Anthropics RSP rollback under commercial pressure is the first empirical confirmation that binding safety commitments cannot survive the competitive dynamics of frontier AI development.md b/domains/ai-alignment/Anthropics RSP rollback under commercial pressure is the first empirical confirmation that binding safety commitments cannot survive the competitive dynamics of frontier AI development.md
index 669cf4e1..b55594ab 100644
--- a/domains/ai-alignment/Anthropics RSP rollback under commercial pressure is the first empirical confirmation that binding safety commitments cannot survive the competitive dynamics of frontier AI development.md	
+++ b/domains/ai-alignment/Anthropics RSP rollback under commercial pressure is the first empirical confirmation that binding safety commitments cannot survive the competitive dynamics of frontier AI development.md	
@@ -39,6 +39,12 @@ METR's pre-deployment sabotage reviews of Anthropic models (March 2026: Claude O
 
 The response gap explains a deeper problem than commitment erosion: even if commitments held, there's no institutional infrastructure to coordinate response when prevention fails. Anthropic's RSP rollback is about prevention commitments weakening; Mengesha identifies that we lack response mechanisms entirely. The two failures compound — weak prevention plus absent response creates a system that cannot learn from failures.
 
+### Additional Evidence (confirm)
+*Source: [[2026-03-20-metr-modeling-assumptions-time-horizon-reliability]] | Added: 2026-03-23*
+
+METR's finding that their time horizon metric has 1.5-2x uncertainty for frontier models provides independent technical confirmation of Anthropic's RSP v3.0 admission that 'the science of model evaluation isn't well-developed enough.' Both organizations independently arrived at the same conclusion within two months: measurement tools are not ready for governance enforcement.
+
+
 
 
 Relevant Notes:
diff --git a/inbox/queue/.extraction-debug/2026-03-20-metr-modeling-assumptions-time-horizon-reliability.json b/inbox/queue/.extraction-debug/2026-03-20-metr-modeling-assumptions-time-horizon-reliability.json
new file mode 100644
index 00000000..9ac5d3de
--- /dev/null
+++ b/inbox/queue/.extraction-debug/2026-03-20-metr-modeling-assumptions-time-horizon-reliability.json
@@ -0,0 +1,24 @@
+{
+  "rejected_claims": [
+    {
+      "filename": "capability-measurement-saturation-creates-governance-enforcement-gap-at-frontier.md",
+      "issues": [
+        "missing_attribution_extractor"
+      ]
+    }
+  ],
+  "validation_stats": {
+    "total": 1,
+    "kept": 0,
+    "fixed": 1,
+    "rejected": 1,
+    "fixes_applied": [
+      "capability-measurement-saturation-creates-governance-enforcement-gap-at-frontier.md:set_created:2026-03-23"
+    ],
+    "rejections": [
+      "capability-measurement-saturation-creates-governance-enforcement-gap-at-frontier.md:missing_attribution_extractor"
+    ]
+  },
+  "model": "anthropic/claude-sonnet-4.5",
+  "date": "2026-03-23"
+}
\ No newline at end of file
diff --git a/inbox/queue/2026-03-20-metr-modeling-assumptions-time-horizon-reliability.md b/inbox/queue/2026-03-20-metr-modeling-assumptions-time-horizon-reliability.md
index 0bdfbf1a..8151e67c 100644
--- a/inbox/queue/2026-03-20-metr-modeling-assumptions-time-horizon-reliability.md
+++ b/inbox/queue/2026-03-20-metr-modeling-assumptions-time-horizon-reliability.md
@@ -7,9 +7,13 @@ date: 2026-03-20
 domain: ai-alignment
 secondary_domains: []
 format: technical-note
-status: unprocessed
+status: enrichment
 priority: high
 tags: [metr, time-horizon, measurement-reliability, evaluation-saturation, Opus-4.6, modeling-uncertainty]
+processed_by: theseus
+processed_date: 2026-03-23
+enrichments_applied: ["Anthropics RSP rollback under commercial pressure is the first empirical confirmation that binding safety commitments cannot survive the competitive dynamics of frontier AI development.md"]
+extraction_model: "anthropic/claude-sonnet-4.5"
 ---
 
 ## Content
@@ -53,3 +57,14 @@ METR published a technical note (March 20, 2026 — 3 days before this session)
 PRIMARY CONNECTION: [[scalable oversight degrades rapidly as capability gaps grow with debate achieving only 50 percent success at moderate gaps]]
 WHY ARCHIVED: Direct evidence that the primary capability measurement tool has 1.5-2x uncertainty at the frontier — governance cannot set enforceable thresholds on unmeasurable capabilities
 EXTRACTION HINT: The "measurement saturation" concept may deserve its own claim distinct from the scalable oversight degradation claim — it's about the measurement tools themselves failing, not the oversight mechanisms
+
+
+## Key Facts
+- METR published technical note on March 20, 2026 analyzing modeling assumption impacts on time horizon estimates
+- Opus 4.6 shows 50% time horizon variation of approximately 1.5x across modeling choices
+- Opus 4.6 shows 80% time horizon variation of approximately 2x across modeling choices
+- Task length noise contributes 25-40% potential reduction in time horizon estimates
+- Success rate curve modeling contributes up to 35% reduction in estimates
+- Opus 4.6 shows 40% reduction when excluding public tasks, driven by RE-Bench performance
+- Confidence interval for Opus 4.6's 50% time horizon spans 6-98 hours (16x range)
+- Older models show smaller modeling assumption impact due to more data and less extrapolation