ADR-006: Unify on registry.execute() as the single invocation entry point.
Call protocol becomes internal transport for cross-process routing.
CallHandler calls execute() instead of reimplementing lookup/validation.
Access control enforcement in execute() with trusted flag for nested calls.
Default-deny: reject when requiredScopes non-empty and identity absent.
Source-vs-spec drift tables added to call-protocol.md and api-surface.md,
documenting all gaps between architecture docs and current source:
- ADR-005 gaps (envelope types, pipeline, factory functions)
- ADR-006 gaps (unified invocation, access control, CallHandler refactor)
- Two bugs: checkAccess() resource bypass when identity.resources is
undefined, and PendingRequestMap type/class naming conflict
Extracted from alkhub_ts packages/core/operations/ and packages/core/mcp/.
- Runtime-agnostic (injected fs/env deps, no Deno globals)
- Direct @logtape/logtape import instead of logger wrapper
- PendingRequestMap with pubsub-wired call protocol
- Peer-dep isolation for MCP adapter (sub-path export)
- Schema const naming convention (XSchema + X type alias)
- 68 tests passing, build + lint + test all green