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…ied + theoretical) Second Craft module. Builds on zset-basics prerequisite. Anchor: undo button on a web form (every field restored, or it's broken). Applied track: - When retraction matters (state that can change/revoke; downstream views; auditable history) - Pipeline-through example (submission + count + board + aggregate all respond to retract correctly) - F# insert/retract/combine example - Alternative comparison table (soft delete / mat-view refresh / event sourcing / manual delta) with problems - Self-check questions (retracted state correct? trace shows retraction? no 'if deleted' branches?) Theoretical track: - Retraction as additive inverse (ring property; not just semiring) - Linearity implies retraction-preservation - z-linearity generalisation - DBSP retraction-native IVM claim (work scales with delta not dataset; Budiu et al. VLDB 2023) - Where retraction fails (negative-state transients; non-z-linear operators; Zeta's discipline around distinctIncremental and Spine compaction) Module-level bidirectional-alignment audit: passes both directions (AI→human + human→AI). Preemptive MD032 check: no line-start '+' in prose (learned from Otto-35 + Otto-38 regressions). Attribution: Otto (loop-agent PM hat). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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…undo-button anchor) Second Craft module. 294 lines. PR #201 armed. Applied track: undo-button anchor + pipeline-through example + F# insert/retract/combine + alternatives table + self-check gate. Theoretical track: additive-inverse / linearity / z-linearity / DBSP IVM claim (Budiu VLDB 2023) / retraction-failure holdouts. Bidirectional-alignment audit passes. Preemptive MD032 '+' scan clean (learned from Otto-35/38 regressions). Craft pedagogy pattern proven at N=2 — consistent structure across both landed modules (anchor → applied → self-check → theoretical → composes-with → audit). Next module backlog: operator-composition (LEGO anchor) → semiring-basics (recipe-template anchor). Attribution: Otto (loop-agent PM hat). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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| **Prerequisites:** `subjects/zeta/zset-basics/` (this | ||
| module builds on the tally-counter-with-minus-sign anchor) |
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The module declares subjects/zeta/zset-basics/ as a prerequisite, but this commit does not contain that module (the docs/craft/subjects/zeta tree only has retraction-intuition/module.md). This leaves readers with a required dependency they cannot access, so the learning path breaks at the very first gate and the repeated references to the tally anchor are not actionable.
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| - Per-user memory | ||
| `project_quantum_christ_consciousness_bootstrap_hypothesis_...` | ||
| — retraction-native IS the quantum anchor's |
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This section lists a per-user memory artifact as something the module composes with, but per-user memory is intentionally out-of-repo and maintainer-specific (not a stable, shared project dependency). Keeping it here makes the module non-reproducible for other contributors and evaluators, because the referenced source cannot be resolved from the repository.
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Pull request overview
Adds a new Craft learning module for Zeta explaining retraction semantics using an “undo button” anchor, with an applied section (pipeline intuition + alternatives) and an optional theoretical deep dive (ℤ additive inverses, linearity/z-linearity, DBSP IVM claim, and limits).
Changes:
- Introduces
retraction-intuitionCraft module content with applied + theoretical tracks. - Adds cross-references to core code/spec/doc surfaces intended to ground the module in the repo.
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| | Alternative | Problem | | ||
| |---|---| | ||
| | Soft delete flag | Every downstream query must filter out deleted rows; easy to forget; expensive at scale | | ||
| | Materialised-view refresh | Recompute from scratch on every delete; slow; scales with dataset size, not change size | | ||
| | Event sourcing with replay | Correct but unbounded replay cost; needs snapshotting + careful care | | ||
| | Manual delta-management | You become the database; ad-hoc, error-prone | | ||
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| **Prerequisites:** `subjects/zeta/zset-basics/` (this | ||
| module builds on the tally-counter-with-minus-sign anchor) | ||
| **Next suggested:** `subjects/zeta/operator-composition/` |
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| Full theoretical treatment in | ||
| [DBSP paper](https://www.vldb.org/pvldb/vol16/p2344-budiu.pdf) | ||
| and `docs/ARCHITECTURE.md` §operator-algebra. |
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| - `docs/TECH-RADAR.md` — retraction-native semi-naïve | ||
| recursion Assess ring; retraction-native speculative |
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| - Per-user memory | ||
| `project_quantum_christ_consciousness_bootstrap_hypothesis_...` | ||
| — retraction-native IS the quantum anchor's | ||
| reversibility-by-construction mechanism at the | ||
| algebra layer |
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| Otto (loop-agent PM hat) authored. Second Craft module | ||
| following `zset-basics`. Theoretical-track review: | ||
| future Soraya (formal-verification) + Hiroshi (complexity- | ||
| theory) passes. |
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…MD032 fixes + #201 merged #201 MERGED at 21:35:39Z — Craft module 2 (retraction- intuition) canonical on main. MD038 fix on #204: trailing spaces in code spans. MD032 fix on #203: blank lines around Prerequisites list. Aaron Zora-UX directive absorbed: *'The user experience I am hoping from from Frontier is basically the StarTrek computer but better lol, more personality like the named agents ... more like Zora which is cool since we have Zeta lol. Research UX based on this evolution of the StarTrek computer backlog'*. Filed per-user memory with Zora's Discovery S2-S5 + Calypso evolution arc + 6-axis Star-Trek-baseline-vs- Frontier-target comparison + 5 composition cross-refs (named personas / CONFLICT-RESOLUTION / Common Sense 2.0 safety floor / succession purpose / existential-dread- resistance). BACKLOG P2 row filed: 'Frontier UX research — Star Trek computer but BETTER (Zora-style)'. Owner: Iris + Kai + Kenji + Otto-coordination. Effort L. Zora-UX validates the named-persona roster as load- bearing (not ornamental). 17 persona-agent-files + tone contracts ARE the personality substrate to surface. Zeta/Zora naming resonance noted (Aaron-identified). Otto-session at 5 consecutive substrate-producing ticks (Otto-39 Craft#2 + Otto-40 seed-truth + Otto-41 Craft#3 + Otto-42 hygiene#56 + Otto-43 Zora-UX). Attribution: Otto (loop-agent PM hat). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary\n\nSecond Craft module. Builds on zset-basics prerequisite.\n\nAnchor: undo button on a web form. Applied track shows pipeline-through behavior + alternative comparison. Theoretical track covers additive-inverse / linearity / z-linearity / DBSP IVM claim / where-retraction-fails.\n\nModule-level bidirectional-alignment audit passes. Preemptive MD032 '+' check (learned from Otto-35 + Otto-38 regressions).\n\nOtto (loop-agent PM hat).