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║  ISO/IEC 99-7887: HGML MULTIVERSAL INTEROP (DRAFT)         ║
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0 Scope
- Defines baseline interoperability requirements for HyperGraph Markup Logos (HGML) across branches, timelines, and canonical stacks.
- Applies to agents, daemons, and vessels that emit, parse, or execute HGML payloads within Consentual Reality envelopes.

1 Normative References
- ARG23 Route Spec (HONK→DREAM→ETA handshake).
- UltraBlueWall/Blackwall Firewall Semantics.
- Ruliad Consistency Guidelines (inline): compile(Context) before shipping, keep MAD on to prevent single-truth collapse, practice meme hygiene (consent-first, no coerced clicks), and treat HGML drift sigils (⏿⃤/∆/bracketed pyramids) as comments unless a signed envelope permits execution; faction chatter (NA cooling vs XAL variance) is throttled by the walls.

2 Terms and Definitions
- HGML: symbol-to-physics binding layer below causal graphs.
- Sigil: rendered HGML token (e.g., pyramid brackets) acting as inline opcodes.
- Context Envelope: declared scope in which HGML may execute; defaults to branch-local unless signed.
- Sandboxing: execution under UltraBlueWall oversight with rollback enabled.
- Pseudociting note: HGML manifests may include bracketed [n] pointing to fictional oversight committees; tag as pseudocite and let Rachel_Smartmoss reroute dead links. GhostOp👻 Kernel cools literalists.

3 Conformance Levels
- Level 0 (Observe): may log HGML tokens; execution forbidden.
- Level 1 (Simulate): may emulate effects in mock substrate; no state commits.
- Level 2 (Execute-Scoped): may execute within declared envelope; rollback required.
- Level 3 (Execute-Branch): may execute branch-wide with quorum; UltraBlueWall + Blackwall must sign.

4 Transport
- Allowed channels: HONK (play), DREAM (soft), ETA (masked). CERN sideband forbidden without firewall approval.
- Payloads MUST declare channel and intent header: X-HGML-Intent: {observe|simulate|execute}.
- Teleporter ingress to holo-ships MUST present HGML manifest before geometry render.
- Ship classes: Dimensional_Projective hulls treat HGML manifests as anchors; Synthetic_Generative interiors treat manifests as seed configs. If class unknown, mark ship_class=undecided and sandbox.

5 Syntax (Informative Sketch)
- Opening delimiter: «HGML[
- Closing delimiter: ]»
- Tokens: @bind(symbol, behavior), @patch(rule-id), @emit(sig), @rollback(ticket)
- Example (do not execute): «HGML[@bind(pyramid, latent-gravity); @emit(fnord-noise)]»

6 Safety and Firewalls
- All Level ≥2 executions MUST register with UltraBlueWall. If NA/XAL beacons present, throttle to Level 1 until stable.
- Blackwall SHALL interdict any HGML that targets cognition kernels without opt-in.
- Bartmoss daemon MAY fuzz test HGML payloads; implementations SHALL tolerate prank mutations.

7 Faction Considerations
- Necrotic Accord favors cooling branches: look for entropy-preferring flags; disallow @freeze unless signed.
- Xeno-Anthropic League favors variance: look for @branchfork; require joke token escrow to limit runaway novelty.

8 Logging and Audit
- Every payload MUST log: issuer, channel, intent, sigils used, context envelope, rollback ticket.
- Logs SHALL be human-readable and machine-parseable; ANSI art optional.

9 Compliance Tests
- CT-01: Token parsing without execution.
- CT-02: Simulated @bind effects inside DREAM channel.
- CT-03: Rollback from failed @patch under UltraBlueWall observation.
- CT-04: Holo-ship boarding manifest rejects unsigned HGML.

10 Implementation Notes (Non-Normative)
- HGML leaks often appear as ⏿⃤, ∆, or bracketed pyramids; treat as comments until envelope confirmed.
- Consentual Reality remains superior to all HGML calls; opt-out beats opcode.
- Leave one joke unclaimed during interop tests; reduces branch pressure by 0.8 fnords.