FE-736: JSONL session viability proof (M2)

[lunelson]

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[lunelson]

• Add Pi worktree switch selector #175
• FE-807: Structured response capture into selected-spec graph truth #173
• FE-808: Broaden direct graph-tool proof beyond the A14 happy path #171
• FE-806: Agent prompt-resource composition, runtime manifests, and snapshot contexts #169
• FE-795: Live selected-spec graph observer over web RPC #166
• FE-785: M5 agent-graph-integration #163
• FE-776: Graph Layer preps #162
• FE-744: Document Pi command containment evidence #150
• FE-737: Web shell over the same host (M3) #147
• FE-736: JSONL session viability proof (M2) #146 👈 (View in Graphite)
• FE-735: Mode shell and fixture driver (M1) #144
• FE-702: Walking skeleton — brunch binary + TUI over pi (M0) #142
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[cursor]

PR Summary

Medium Risk
Changing RPC/projection to active-branch semantics can diverge from full-file reads until D24-L linear guards land; large SPEC/PLAN edits are doc-only but must stay aligned with code behavior.

Overview
M2 JSONL session viability is implemented and reflected in planning memory: new round-trip and M1 fixture replay tests cover raw payloads, brunch.session_binding, Brunch custom entries/messages, continuity/compaction metadata, structured elicitation, and coordinator reload paths. session.elicitationExchanges and related projection now load the Pi session’s active branch via loadActiveBranchTranscriptEntries (not naïve full-file line reads), with branch-shape tests documenting substrate behavior ahead of D24-L linear transcript enforcement.

Canonical docs advance in parallel: memory/SPEC.md / memory/PLAN.md promote M2 completion, set web-shell as active, add linear-session constraints, generative-lens / review-set decisions (D25–D32, I15–I20), and expand M5+ verification notes; new design companions ELICITATION_LENSES.md and REVIEW_SETS.md. Agent workflow adds ln-witness (test evidentiary audit) and updates docs/praxis/ln-skills.md.

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Merge activity

• Jun 2, 5:33 PM UTC: Graphite rebased this pull request, because this pull request is set to merge when ready.