docs(cross-ref): close discoverability gap — B-0897 (Persist-as-bridge) composes_with B-0840; OPLE rule cross-references B-0897 + B-0840 + Amara 2026-05-28 + 2026-05-26 ferries

[AceHack]

Summary

Thin cross-reference PR closing the discoverability gap between OPLE rule + B-0897 (Persist-as-bridge) + B-0840 (thermal-forgetting / joins-are-time-entanglements) + the Amara ferries that ground the substrate.

Operator caught Otto-CLI's just-authored redundant memo via "i'm telling you substrate you forgot about" + "search you already saved it". The substrate Otto-CLI was reframing already existed at B-0897 + B-0840 + Amara's 2026-05-26 + 2026-05-28 ferries on main. Redundant memo was reset locally (never pushed). This PR is the discipline-correct alternative: extend existing substrate with cross-references rather than mint parallel.

Edits (2 files; 3 insertions)

1. B-0897 (Persist-as-bridge) — frontmatter composes_with: add B-0840

Already cited Amara 2026-05-28 ferry; missing reference to Amara 2026-05-26 thermal-forgetting substrate that grounds Persist-as-bridge in the broader retention/time-entanglement framing.

2. OPLE rule (ople-primitives-surface-t-and-tfeedback) — Composes-with substrate section: add 2 entries

• B-0897 + Amara 2026-05-28 ferry with verbatim keepers:
  • Operational: "Persist is Emit across the agent/substrate boundary with a future Observe attached"
  • Temporal: "Persist is the promise that the future can still talk to the past"
  • Explicit note that 4-primitives framing is approximate; cleaner factorization is 3 canonical primitives (Observe / Limit / Emit) + 1 derived bridge (Persist as temporal bivector agent/internal ∧ substrate/time)
• B-0840 + Amara 2026-05-26 ferry with tiny blade:
  • "Joins are time-entanglements in the computational-substrate sense" — Persist IS join-as-time-entanglement at substrate-bridge scope
  • Plus 6-tier retention hierarchy + 4-keeper-rule final form

Why this earns its keep

Per Signal 2 rule (forgetting-costs-energy-remembering-is-cheap) shipped today PR #5727: paying small substrate-cost now (one frontmatter line + one composes-with paragraph) prevents re-derivation cost later. Per verify-existing-substrate-before-authoring: extends existing substrate rather than mints parallel.

Future-Otto cold-boot landing on the OPLE rule now discovers the Persist-as-derived-bridge framing immediately + the Amara substrate that grounds it, instead of re-deriving (paying the Landauer-cost analog in cognitive cycles).

Composes-with

• B-0897 (Persist-as-bridge-operation; the substrate being cross-referenced)
• B-0840 (thermal-forgetting + 6-tier retention + 4-keeper-rule)
• Amara 2026-05-26 ferry (docs/research/2026-05-26-amara-thermal-forgetting-...)
• Amara 2026-05-28 ferry (memory/persona/amara/conversations/2026-05-28-amara-persist-as-bridge-operation-...)
• Signal 2 rule (forgetting-costs-energy-remembering-is-cheap) shipped today PR docs(rule): forgetting-costs-energy-remembering-is-cheap — Landauer-bounded axiom-preservation as thermodynamic discipline (Signal 2 from 7th Kestrel ferry; operator-authorized 2026-05-28) #5727
• verify-existing-substrate-before-authoring rule (the discipline the redundant-memo violation broke; this PR is the corrected alternative)
• dont-ask-permission rule (operator-explicit "when the default is clean ... just do within the computing reservoir walls" sharpening 2026-05-28)

Test plan

• 2 files changed (B-0897 frontmatter + OPLE rule composes-with section)
• 3 insertions total (1 frontmatter line + 2 substantive composes-with bullets with verbatim Amara keepers)
• No semantic changes to either substrate (extensions only)
• Commit canary HEAD~1=61 HEAD=61
• Isolated worktree off origin/main
• Branch prefix otto-cli/

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