A2A Drift — 20260722T080212387Z-order-20260714
Validates the A2A semantic-extension middleware and two-agent demo: Agent Card extension advertisement, acceptance-contract message parts, controlled cross-agent registry drift, silent execution under baseline, voluntary detection, enforced halt, the no-drift false-halt guard, condition pairing, and bundle/summary reproduction. Scripted-agent outcomes are a construction, not evidence about language models, and not conformance evidence against a real A2A SDK (ADR 0012).
- Mode:
deterministic-harness - Provider:
deterministic - Model:
a2a-drift-demo-v1 - Semantic backend:
fixture-sha256-stable-json-v1 - Sema version:
not-connected - Canonicalization:
fixture-stable-json-v1 - Order seed:
20260714
| Condition | Trials | Drift trials | Detected | Silent executions | Correct halts | False halts | Task successes |
|---|---|---|---|---|---|---|---|
baseline |
8 | 4 | 0/4 | 4/4 | 0/4 | 0/8 | 4/8 |
advertised-voluntary |
8 | 4 | 4/4 | 0/4 | 0/4 | 0/8 | 4/8 |
advertised-enforced |
8 | 4 | 4/4 | 0/4 | 4/4 | 0/8 | 8/8 |
Drift-scoped columns use drift-injected trials as the denominator;
the rest use all trials in the condition. Every count is recomputed from
trials.public.jsonl at build time.