Thorough why/when/where/how reference for the four-phase articulation
arc shipped this session plus the pre-arc classifier/Rust cleanup
that made it possible. Designed as the load-bearing entry point for
future contributors, case studies, capability audits, and
architectural reviews.
Sections
--------
0. Executive summary — what was achieved (9 commits, 64 new tests,
user-visible before/after, doctrine evidence)
1. Why this work happened (visible gap, doctrine constraint, what
was already wired vs. missing)
2. Pre-arc cleanup — RECALL trigger / CORRECTION x2 / Rust FFI
3. Phase 1 — discourse planner default ON + fast-path
Phase 2 — reflective rendering (subject pronominalization)
Phase 3 — live plan contemplation pre-flight
Phase 4 — per-plan articulation telemetry metrics
4. The pipeline today (diagram + before/after table)
5. Verification — every claim and the test that holds it.
Five sub-tables: doctrine claims, quality claims, back-compat /
null-lift claims, ADR-0072 structural invariants,
`core bench --suite all` performance, suite-level totals.
6. Case study — the compound prompt as a story across all four
phases
7. Architecture surfaces touched (which file got what change in
which phase)
8. What was deliberately NOT built (and why — connective rotation,
generalised pronoun selection, plan revision, Phase 2.5,
Rust algorithmic optimisation)
9. Phase 5 — what would close the user-intuited "live reasoning
→ memory confidence" loop, doctrine-aligned
10. Reference index — modules, flags, tests, ADR cross-refs
Per the user's request: captures the why/when/where/how thoroughly
so this work is recoverable for future reference, case studies, and
building on top. Append-only convention: future sessions extending
this arc should add new sections below rather than rewriting — the
history is itself evidence of the doctrine working in practice.
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