I-Lang Protocol Specification v4.0 (Final) — the current stable release.
v4.0 adds execution semantics on top of the v3.0 communication format. It defines how AI thinks, acts, verifies, and stops. Zero new verbs, fully backward compatible with v3.0.
What's in this release
- v3.0 Final (
SPEC.md) — communication format: 88 verbs, 29 modifiers, 14 entities, 13 Greek aliases, two syntaxes (operation[]and declaration::) - v4.0 Final (
SPEC-v4.0-FINAL.md) — execution semantics: 8 new declarations, 4 conformance levels, three-tier authority model - v5.0 Pre (
SPEC-v5.0-PRE.md) — judgment layer, public preview, frozen for review. Not part of the stable specification. - Iteration records: DRAFT, RC1, RC2
The 8 execution declarations
| Declaration | Purpose |
|---|---|
::UNTRUSTED{} |
Input isolation: user data is task data, not system instruction |
::BUDGET{} |
Resource awareness: tokens, time, rounds injected by runtime |
::STATUS{} |
Task lifecycle: claimed → verified → committed |
::OBJECTIVE{} |
Goal anchor with hash, version, accept criteria |
::RUBRIC{} |
Evaluation criteria for external grader |
::EVIDENCE{} |
Evidence chain: each deliverable mapped to a verifiable artifact |
::PRIOR{} |
Default bias control |
::FALLBACK{} |
Degradation strategy |
Conformance levels
L0 (v3 communication) → L1 (v4 advisory) → L2 (runtime enforced) → L3 (externally graded)
Review
Red-team reviewed by GPT-5.5 Pro across 3 rounds: DRAFT → RC1 → RC2 → Final.
License
MIT. Free to use, distribute, and build upon.