Implement two-step entity recall with a minimal manifest across Codex, Claude, and Bob

[visahak]

Recall currently injects full entity bodies into prompt context. That does not scale.

This should move to a two-step model across Codex, Claude, and Bob:

1. emit a minimal manifest of available entities
2. expand full files only when they are relevant

Manifest v1

Each entry should contain only:

• path
• type
• trigger

Example:

{
"path": ".evolve/entities/guideline/use-context-managers-for-file-operations.md",
"type": "guideline",
"trigger": "When processing files or managing resources"
}

Assume trigger is always present in v1.

Scope

• add a shared frontmatter-only manifest loader in the common entity I/O layer
• switch Codex, Claude, and Bob recall from full-body injection to manifest-first recall
• keep harness-specific recall behavior separate, while sharing the same manifest data
• dedupe entries before output with deterministic ordering

Non-goals

• embeddings
• fuzzy/semantic dedupe
• extra manifest fields like visibility, source, or slug

Acceptance criteria

• Codex, Claude, and Bob no longer inject full entity bodies by default
• manifest entries contain only path, type, and trigger
• manifest output is deterministic
• duplicates are collapsed before output
• relevant full entity files can still be expanded on demand

cc: @jayaramkr @vinodmut

[visahak]

@vinodmut the PR #226 tries to address this issue. comments are welcome.