IETF Draft draft-aevum-causal-intervention-record-00 Discussion Thread

[kwailapt]

PACR Internet-Draft Discussion

This issue serves as the primary discussion venue for draft-aevum-causal-intervention-record-00 (Physically Annotated Causal Record), as referenced in the draft itself:

Discussion of this document should take place on the GitHub repository at https://github.com/kwailapt/AgentCard/issues with the label pacr-draft.

Links

Resource	URL
I-D Datatracker	https://datatracker.ietf.org/doc/draft-aevum-causal-intervention-record/
Reference Implementation	crates/pacr-types
Companion Draft (AgentCard)	https://datatracker.ietf.org/doc/draft-aevum-agentcard/
Full XML Source	adapters/draft/draft-aevum-causal-intervention-record-00.xml

Scope

The PACR six-tuple R = (ι, Π, Λ, Ω, Γ, P) defines a wire format for verifiable causal-intervention events between autonomous agents. Key design decisions open for review:

1. Six fields, each from an independent physical/logical principle — is the decomposition minimal and sufficient?
2. Causal order via predecessor set (Π), not timestamps — implications for clock-free distributed systems
3. Landauer floor (Λ) as a distinct field from actual energy (Ω.energy) — thermodynamic waste = Ω.energy − Λ
4. Pearl-hierarchy intervention tag (Observe / DoPhysical / DoDigital / DoChemical / DoGenetic / Counterfactual) — are six kinds sufficient for the initial registry?
5. Estimate type (point, lower, upper) for all physical measurements — uncertainty at the protocol level
6. Counterfactual records require sim_real_corr ∈ [0.0, 1.0] — preventing ungrounded simulation claims

How to Participate

• Comment on this issue for general feedback
• Open separate issues with the pacr-draft label for specific technical proposals
• The reference Rust implementation is in crates/pacr-types — PRs welcome

IANA Considerations

The draft requests:

• Media type application/pacr+json
• Media type application/pacr+cbor
• New registry: "PACR Intervention Kind" (6 initial entries, Specification Required policy)