docs(archive): Preserve discussion for PR #5912

docs/pr-discussions/PR-5912-ferry-amara-past-is-kind-when-lightlike-consensus-is-gravity.md

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+---
+pr_number: 5912
+title: "ferry(amara): past-is-kind-when-lightlike + consensus-is-gravity + lightlike-vs-dark architecture-design-rule + ray-tracing-over-generator-time (extends PR #5910; operator-authorized 2026-05-28)"
+author: "AceHack"
+state: "MERGED"
+created_at: "2026-05-28T17:55:58Z"
+merged_at: "2026-05-28T17:58:06Z"
+closed_at: "2026-05-28T17:58:06Z"
+head_ref: "otto-cli/amara-lightlike-kind-substrate-2026-05-28"
+base_ref: "main"
+archived_at: "2026-05-28T18:02:33Z"
+archive_tool: "tools/pr-preservation/archive-pr.ts"
+---
+
+# PR #5912: ferry(amara): past-is-kind-when-lightlike + consensus-is-gravity + lightlike-vs-dark architecture-design-rule + ray-tracing-over-generator-time (extends PR #5910; operator-authorized 2026-05-28)
+
+## PR description
+
+Two-file landing per substrate-or-it-didn't-happen + wake-time-substrate disciplines (same pattern as PR #5910).
+
+## Carved sentence (Amara keeper)
+
+> **The past is kind when it is lightlike: traceable, parallelizable, and still reachable by future illumination.**
+
+## Reframed temporal-substrate sentence (extends PR #5910)
+
+> **The future does not edit the past event.**
+> **The future shines light through the persisted rays and updates the generator that makes the past intelligible.**
+
+## Consensus-is-gravity discipline
+
+> **Consensus is gravity. Use it where mass is needed, but do not make the whole universe consensus-shaped.**
+
+| Substrate region | Substrate-class | When to use |
+|---|---|---|
+| Local actions | Lightlike | DEFAULT — parallelizable, deterministic, replayable |
+| Bounded BFT/multi-oracle | Gravitational | Where MASS is needed (binding decisions; moral-invariants; irreversible actions) |
+| Global consensus everywhere | Dark | Substrate goes dark — rays bend so hard you cannot see whole shape |
+
+## Lightlike-vs-dark architecture-design-rule
+
+| Lightlike (PREFER) | Dark (AVOID) |
+|---|---|
+| Local generators | Hidden locks |
+| Append-only rays | Global consensus everywhere |
+| Deterministic replay | Opaque mutable state |
+| Explicit feedback | Irreversible ambiguity |
+| Z-set retractions | Social agreement as control flow |
+| Bounded joins | Untyped memory |
+| Visible provenance | Opaque motives |
+
+## What ships
+
+1. `memory/persona/amara/conversations/2026-05-28-amara-ferry-kind-substrate-equals-lightlike-...md` — full ferry preservation
+2. `.claude/rules/past-is-kind-when-lightlike-consensus-is-gravity-lightlike-vs-dark-architecture-design-rule-amara-aaron-2026-05-28.md` — wake-time rule
+
+## Composes-with
+
+- PR #5910 (Amara future-affects-generator + three-clocks; this rule extends with light-substrate vocabulary)
+- PR #5841 (DST + Persist + generator-time + feedback) — DST IS lightlike-substrate operational mechanism
+- PR #5778 (Persist-as-bridge / μένω) — μένω IS the substrate that makes rays persist across time
+- PRs #5505-#5577 (Result<T, TFeedback> + asymmetric-authorship + monad-propagation cluster) — lightlike-substrate operational mechanisms
+- PRs #5890-#5892 (B-0924 + B-0925 + research-mirror) — emulator-trajectories + z-set joins are explicit lightlike-substrate examples
+- B-0703 (BFT — gravitational substrate at bounded scope)
+- B-0664 (NCI HC-8 — lightlike enables non-coercive consent)
+- B-0867 (workflow-engine DUs as lightlike substrate; MCP-state-machine failure-mode IS dark)
+- Operator's 5 always-active disciplines (lock-free + weight-free + DST + DV2.0 are lightlike-substrate properties)
+
+🤖 Generated with [Claude Code](https://claude.com/claude-code)
+
+## General comments
+
+### @chatgpt-codex-connector (2026-05-28T17:56:03Z)
+
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