memory(detect-changes pattern): sibling-repo parallel-optimized external anchor (Aaron 2026-05-01)

memory/MEMORY.md

@@ -6,6 +6,7 @@
 
 - [**Prefer mechanical / external anchors over Aaron-as-anchor when alternatives exist (Aaron 2026-05-01)**](feedback_prefer_mechanical_external_anchors_over_aaron_as_anchor_aaron_2026_05_01.md) — Aaron 2026-05-01: *"would Aaron name this file/branch/commit this way? best find an external anchor other than me."* Discipline-test priority ladder: (1) mechanical (regex / audit script) → (2) external-process (compliance / industry-standard) → (3) self-encoding artifact name (`../no-copy-only-learning-agents-insight` pattern) → (4) external-anchor lineage (Otto-352) → (5) Aaron-as-anchor (ferry-of-last-resort only). Aaron-as-test-anchor IS the directive frame Otto-357 names. Carved: *"Aaron is the ferry-of-last-resort, not the test-of-first-resort."*
 - [**Otto-buddy spin-up when "wait" is the obvious answer + goldfish-ontology failure mode (Aaron 2026-05-01)**](feedback_otto_buddy_spin_up_when_waiting_aaron_2026_05_01.md) — Aaron 2026-05-01 — when Otto's obvious-next-action is "wait," that IS the buddy spin-up trigger (kill-switchable named-persona instance, mirror-language sense per `feedback_engagement_under_discipline_not_avoidance_*`). Existing `tools/peer-call/<x>.sh` IS the buddy-spawn surface when Otto holds the PID. Mutual-improvement loop: bidirectional teaching stabilizes both substrates over iterations. Memo's own caused_by chain demonstrates the deeper failure mode Aaron named: **goldfish-ontology** — Otto builds rich ontologies (great at it) but never uses them >30 min before forgetting + recreating the same substrate; the buddy is the active-reminder layer that greps existing ontologies pre-authoring.
+- [**detect-changes pattern + multi-ruleset architecture — the sibling-repo external anchor as parallel-optimized external anchor (Aaron 2026-05-01)**](feedback_detect_changes_pattern_sibling_repo_parallel_optimized_external_anchor_aaron_2026_05_01.md) — Aaron 2026-05-01: *"`../no-copy-only-learning-agents-insight` is the best repo in github i've seen setup to be parallel."* Direct inspection (DST grade-A pull-to-sibling-repo + gh-api-on-host) revealed: detect-changes.yaml emitting per-change-class outputs (PRs only run relevant checks); 42 fine-grained workflows; bash+PS1 test parallelism pair; **5 concern-aligned rulesets** empirically validating B-0155 architecture; **branch protection effectively empty** (zero contexts, all migrated to rulesets) — proof B-0155 Phase 3 cleanup endpoint works at production scale. The sibling-repo external anchor uses Wiki not Pages; Aaron's prior Jekyll-on-Pages was a workaround, not preference (*"bun is probably enough"*). Attribution: the sibling-repo external anchor is deliberate-by-others (multi-engineer org-scale) vs Aaron-clicked-alone Zeta — high-credibility external anchor. (Distinct from ServiceTitan-the-employer references elsewhere in this index — `../no-copy-only-learning-agents-insight` is a separate sibling repo I inspected; ServiceTitan-related grandfathered memory files retain "ServiceTitan" in their descriptions.)
 - [**Prefer TS scripts over dynamic bash for conversation UX + DST achievability (Aaron 2026-05-01)**](feedback_prefer_ts_scripts_over_dynamic_bash_for_conversation_ux_dst_in_ts_aaron_2026_05_01.md) — Aaron 2026-05-01 *"a lot of red bash / pwsh failures"* damages conversation UX (most-humans concern, not Aaron specifically — he's calibrated). Default to pre-existing TS scripts; avoid ad-hoc dynamic bash except when prototyping. **DST is structurally unattainable in bash for general computation; achievable in TS** (seedable PRNG, time injection, native testing, stack traces). EXCEPTION: declarative-bootstrap bash like install.sh + tools/setup/manifests/ is "closest to DST" and is the legitimate-bash zone — Aaron called it *"our ace package management."* Non-install bash with general logic is the TS-port target.
 - [**Assumed-state vs actual-state — audit horizon must default to "everything currently open" not "what I touched recently" (Aaron 2026-05-01 somatic confirmation)**](feedback_assumed_state_vs_actual_state_audit_horizon_check_aaron_2026_05_01.md) — Aaron's *"fuck yes!!! this is great!!"* signal on the tick-1602Z-a7e1 finding (26 LFG PRs in flight vs 5 I'd been tracking). Distinct failure-class from Otto-363 substrate-or-it-didn't-happen (which guards against directives evaporating) and verify-before-deferring (deferred targets not existing). This rule guards the audit horizon itself: *"Assumed-state is what I touched recently. Actual-state is everything currently open. The horizon must default to actual."* Mechanizable via `gh pr list --state open` at-cold-start. Cross-surface (issues, branches, ferries, TaskList, cron triggers).
 - [**Same-model + different-harness produces different biases — Cursor vs Claude Code with Opus 4.7 (Aaron 2026-05-01)**](feedback_same_model_different_harness_produces_different_biases_cursor_vs_claude_code_opus_4_7_aaron_2026_05_01.md) — Empirical signal (single-source YouTube): Cursor + Opus 4.7 outperforms Claude Code + Opus 4.7 on some axis. Same model, different harness → different output. Aaron's framing: this IS a legitimate peer/buddy configuration. Bias-source decomposition: prompt + tools + context-mgmt + sampling + output-format + user-flow. Validates multi-harness peer-mode (rung 5 of parallelism ladder) — peer value compounds across model-axis AND harness-axis. Composes with agent-orchestra cluster (#324-339) + Otto-tasks #301/#303 + parallelism-scaling-ladder.