#40 · the request to present again crosses

1. 213The engine takes #40ENGINE.CURSOR · propagate

   a wave is settlingengine: working on #40membrane: waiting at #36

   1. #0a listener
   2. #1a doer
   3. #2listener: the charter
   4. #3doer: the author
   5. #4listener: charter seen
   6. #5listener: blueprint seen
   7. #6doer: the planner
   8. #7listener: assess · charter
   9. #8listener: assess · result
   10. #9doer: the evaluator
   11. #10the charter wanted
   12. #11the blueprint
   13. #12readiness
   14. #13readiness
   15. #14a request: a charter
   16. #15the charter proposed
   17. #16the charter defined
   18. #17readiness
   19. #18readiness
   20. #19a request: a Cell
   21. #20the seed
   22. #21the Cell is open
   23. #22inner listener
   24. #23inner doer
   25. #24the Cell's context
   26. #25return listener
   27. #26return doer
   28. #27the return address
   29. #28the person's words
   30. #29readiness
   31. #30the private result
   32. #31the result, marked
   33. #32readiness
   34. #33a request: assess
   35. #34assessment proposed
   36. #35the Cell assessed
   37. #36the decisionmembrane
   38. #37the Cell sealed
   39. #38the export
   40. #39readiness
   41. #40a request: present againengine · working
   42. ·end of the log

   What	before		after
   pointer — the next record to take	#40	→	#41

   The engine moves on to #40, the request to present again. Nothing at root re-reads the log for it.

   Where it happens takeNextTuple()Vol. 02 §4.1

   The engine's step: take the record under its pointer and move the pointer on — or stop, if the pointer has reached the end.

   Specification

   Vol. 02 §4.1

   Code

   takeNextTuple() in core/registers/take-next-tuple.ts, line 15: at the end of the log, the engine stops

   Journal

   #40 · ENGINE.CURSOR · propagate · offset: 40 · by engine

   Picture

   pointer — the next record to take: #40 → #41

   1. 1// ENGINE.CURSOR advance (Vol. 02 §4.1) — the machine's instruction pointer:
   2. 2// returns the tuple at the cursor and moves it forward exactly once, or null
   3. 3// at quiescence. Advancing IS the context switch: the ambient wave context
   4. 4// moves to the propagated tuple in the same movement, so every transition
   5. 5// journalled during its propagation is attributed to it — the cube's spine.
   6. 6// The cursor never rewinds.
   7. 7
   8. 8import type { WaveTuple } from "../wave/gate";
   9. 9import type { RegisterFile } from "./register-file";
   10. 10import { recordTransition } from "./record-transition";
   11. 11import { setDriver, setWaveContext } from "./set-wave-context";
   12. 12
   13. 13export function takeNextTuple(file: RegisterFile): WaveTuple | null {
   14. 14 const engine = file.registers.engine;
   15. 15 if (engine.cursor >= engine.base + engine.window.length) return null;↑ at the end of the log, the engine stops
   16. 16 const tuple = engine.window[engine.cursor - engine.base];
   17. 17 engine.cursor += 1;↑ the engine's pointer moves on by one
   18. 18 setWaveContext(file, { offset: tuple.offset, phase: "propagate" });
   19. 19 setDriver(file, "engine");
   20. 20 recordTransition(file, "engine", "ENGINE.CURSOR", "propagate", { offset: tuple.offset });↑ the change is written into the journal
   21. 21 return tuple;
   22. 22}

   AGPL-3.0-onlyThe Lab's demonstration environment, as this fragment ran it (build 043cc8b). The code may change, and may differ from the code of a working machine.

   Nest VM core, incubated in the CoAgnes garden · build 043cc8b (2026-09-21) · this file last changed in 6730f58 (2026-09-13)

when the membrane passed #40

1. 218The membrane passes #40MEMBRANE.CURSOR · sweep

   a wave is settlingengine: at the endmembrane: passing #40

   1. #0a listener
   2. #1a doer
   3. #2listener: the charter
   4. #3doer: the author
   5. #4listener: charter seen
   6. #5listener: blueprint seen
   7. #6doer: the planner
   8. #7listener: assess · charter
   9. #8listener: assess · result
   10. #9doer: the evaluator
   11. #10the charter wanted
   12. #11the blueprint
   13. #12readiness
   14. #13readiness
   15. #14a request: a charter
   16. #15the charter proposed
   17. #16the charter defined
   18. #17readiness
   19. #18readiness
   20. #19a request: a Cell
   21. #20the seed
   22. #21the Cell is open
   23. #22inner listener
   24. #23inner doer
   25. #24the Cell's context
   26. #25return listener
   27. #26return doer
   28. #27the return address
   29. #28the person's words
   30. #29readiness
   31. #30the private result
   32. #31the result, marked
   33. #32readiness
   34. #33a request: assess
   35. #34assessment proposed
   36. #35the Cell assessed
   37. #36the decision
   38. #37the Cell sealed
   39. #38the export
   40. #39readiness
   41. #40a request: present againmembrane · passing
   42. ·end of the logengine

   What	before		after
   pointer — the next record to pass	#40	→	#41

   #40 is a request: the membrane's pointer moves past it, and the membrane looks for someone in the world who will take it.

   Where it happens sweepNextTuple()Vol. 02 §4.6 · Vol. 07 §3

   The membrane's step: pass over the record under its pointer and move the pointer on — exactly once per record.

   Specification

   Vol. 02 §4.6 · Vol. 07 §3

   Code

   sweepNextTuple() in core/registers/sweep-next-tuple.ts, line 16: the membrane's pointer moves on by one

   Journal

   #40 · MEMBRANE.CURSOR · sweep · offset: 40 · by membrane

   Picture

   pointer — the next record to pass: #40 → #41

   1. 1// MEMBRANE.CURSOR advance (Vol. 02 §4.6, Vol. 07 §3): the membrane's own
   2. 2// reading of the one log — the second reception of one publication, never a
   3. 3// second truth. The cursor advances exactly once per offset per machine:
   4. 4// the exactly-once discharge guarantee lives in this movement.
   5. 5
   6. 6import type { WaveTuple } from "../wave/gate";
   7. 7import type { RegisterFile } from "./register-file";
   8. 8import { recordTransition } from "./record-transition";
   9. 9import { setDriver, setWaveContext } from "./set-wave-context";
   10. 10
   11. 11export function sweepNextTuple(file: RegisterFile): WaveTuple | null {
   12. 12 const engine = file.registers.engine;
   13. 13 const membrane = file.registers.membrane;
   14. 14 if (membrane.cursor >= engine.base + engine.window.length) return null;
   15. 15 const tuple = engine.window[membrane.cursor - engine.base];
   16. 16 membrane.cursor += 1;↑ the membrane's pointer moves on by one
   17. 17 setWaveContext(file, { offset: tuple.offset, phase: "sweep" });
   18. 18 setDriver(file, "membrane");
   19. 19 recordTransition(file, "membrane", "MEMBRANE.CURSOR", "sweep", { offset: tuple.offset });↑ the change is written into the journal
   20. 20 return tuple;
   21. 21}

   AGPL-3.0-onlyThe Lab's demonstration environment, as this fragment ran it (build 043cc8b). The code may change, and may differ from the code of a working machine.

   Nest VM core, incubated in the CoAgnes garden · build 043cc8b (2026-09-21) · this file last changed in 6730f58 (2026-09-13)

2. 219The request is handed to the worldDISCHARGE.TABLE · track-discharge

   a wave is settlingengine: at the endmembrane: passing #40

   1. #0a listener
   2. #1a doer
   3. #2listener: the charter
   4. #3doer: the author
   5. #4listener: charter seen
   6. #5listener: blueprint seen
   7. #6doer: the planner
   8. #7listener: assess · charter
   9. #8listener: assess · result
   10. #9doer: the evaluator
   11. #10the charter wanted
   12. #11the blueprint
   13. #12readiness
   14. #13readiness
   15. #14a request: a charter
   16. #15the charter proposed
   17. #16the charter defined
   18. #17readiness
   19. #18readiness
   20. #19a request: a Cell
   21. #20the seed
   22. #21the Cell is open
   23. #22inner listener
   24. #23inner doer
   25. #24the Cell's context
   26. #25return listener
   27. #26return doer
   28. #27the return address
   29. #28the person's words
   30. #29readiness
   31. #30the private result
   32. #31the result, marked
   33. #32readiness
   34. #33a request: assess
   35. #34assessment proposed
   36. #35the Cell assessed
   37. #36the decision
   38. #37the Cell sealed
   39. #38the export
   40. #39readiness
   41. #40a request: present againmembrane · passing
   42. ·end of the logengine

   No register changed its value.

   controller.represent claims #40 — the world's station that carries a committed value to a new address as a fresh fact. The runtime notes the hand-out and waits.

   Where it happens trackDischarge()Vol. 02 §4.6 · Vol. 08 §3

   Notes, at the membrane, that a record has been handed to the world, and keeps it among those the machine still waits on.

   Specification

   Vol. 02 §4.6 · Vol. 08 §3

   Code

   trackDischarge() in core/registers/track-discharge.ts, line 19: the hand-out gets the next number

   Journal

   #40 · DISCHARGE.TABLE · track-discharge · id: 1, controller: controller.represent, offset: 40 · by runtime

   Picture

   no register changed its value

   1. 1// DISCHARGE.TABLE entry (Vol. 02 §4.6, Vol. 08 §3): an in-flight discharge
   2. 2// joins the table under a fresh slot id. The defect path is part of the
   3. 3// entry's own movement: a rejected discharge leaves the table as the
   4. 4// rejection propagates, so the machine stays usable for the next wave
   5. 5// (refimpl 06 §1; host ADR-011 finding 2).
   6. 6
   7. 7import type { WaveEmission } from "../wave/gate";
   8. 8import type { RegisterFile } from "./register-file";
   9. 9import { recordTransition } from "./record-transition";
   10. 10import { setDriver, setWaveContext } from "./set-wave-context";
   11. 11
   12. 12export function trackDischarge(
   13. 13 file: RegisterFile,
   14. 14 claim: { controller: string; offset: number },
   15. 15 discharge: Promise<readonly WaveEmission[]>
   16. 16): void {
   17. 17 setWaveContext(file, { offset: claim.offset, phase: "sweep" }); // attribute to the claimed tuple
   18. 18 setDriver(file, "runtime");
   19. 19 file.ephemeral.nextDischargeId += 1;↑ the hand-out gets the next number
   20. 20 const id = file.ephemeral.nextDischargeId;
   21. 21 file.ephemeral.inFlight.set(↑ it is kept among those still out in the world
   22. 22 id,
   23. 23 discharge.then(
   24. 24 (emissions) => ({ id, controller: claim.controller, offset: claim.offset, emissions }),
   25. 25 (defect: unknown) => {
   26. 26 file.ephemeral.inFlight.delete(id);
   27. 27 recordTransition(file, "runtime", "DISCHARGE.TABLE", "discharge-defect", { id, ...claim });↑ the change is written into the journal
   28. 28 throw defect;
   29. 29 }
   30. 30 )
   31. 31 );
   32. 32 recordTransition(file, "runtime", "DISCHARGE.TABLE", "track-discharge", { id, ...claim });↑ the change is written into the journal
   33. 33}

   AGPL-3.0-onlyThe Lab's demonstration environment, as this fragment ran it (build 043cc8b). The code may change, and may differ from the code of a working machine.

   Nest VM core, incubated in the CoAgnes garden · build 043cc8b (2026-09-21) · this file last changed in 6730f58 (2026-09-13)

when the world answered

1. 220The world answersDISCHARGE.TABLE · resolve-discharge

   a wave is settlingengine: at the endmembrane: passing #40

   1. #0a listener
   2. #1a doer
   3. #2listener: the charter
   4. #3doer: the author
   5. #4listener: charter seen
   6. #5listener: blueprint seen
   7. #6doer: the planner
   8. #7listener: assess · charter
   9. #8listener: assess · result
   10. #9doer: the evaluator
   11. #10the charter wanted
   12. #11the blueprint
   13. #12readiness
   14. #13readiness
   15. #14a request: a charter
   16. #15the charter proposed
   17. #16the charter defined
   18. #17readiness
   19. #18readiness
   20. #19a request: a Cell
   21. #20the seed
   22. #21the Cell is open
   23. #22inner listener
   24. #23inner doer
   25. #24the Cell's context
   26. #25return listener
   27. #26return doer
   28. #27the return address
   29. #28the person's words
   30. #29readiness
   31. #30the private result
   32. #31the result, marked
   33. #32readiness
   34. #33a request: assess
   35. #34assessment proposed
   36. #35the Cell assessed
   37. #36the decision
   38. #37the Cell sealed
   39. #38the export
   40. #39readiness
   41. #40a request: present againmembrane · passing
   42. ·end of the logengine

   No register changed its value.

   The controller returns one answer: the export's result, carried as it is into the field text of a note.given — a structure stays a structure. The discharge closes.

   Where it happens resolveDischarge()Vol. 08 §3 · Vol. 03 §3.3

   Notes that the world has answered: the hand-out is closed, and what came back is ready to enter the log.

   Specification

   Vol. 08 §3 · Vol. 03 §3.3

   Code

   resolveDischarge() in core/registers/resolve-discharge.ts, line 14: no longer waiting on the world

   Journal

   #40 · DISCHARGE.TABLE · resolve-discharge · id: 1, emissions: 1, controller: controller.represent, offset: 40 · by runtime

   Picture

   no register changed its value

   1. 1// DISCHARGE.TABLE settlement (Vol. 08 §3): the earliest completed discharge
   2. 2// leaves the table and its answers re-enter the wave as the next run's
   3. 3// seeds. Earliest completion wins; consumers rely on correlation, never
   4. 4// adjacency (Vol. 03 §3.3).
   5. 5
   6. 6import type { RegisterFile } from "./register-file";
   7. 7import { recordTransition } from "./record-transition";
   8. 8
   9. 9// The resolution names the claim it answers (controller · the swept tuple)
   10. 10// and is journaled under THAT tuple's wave context, so the tuple's own
   11. 11// journal states which discharge answered it (ADR-004 d17); the answer's
   12. 12// emissions are then appended under the same attribution.
   13. 13export function resolveDischarge(file: RegisterFile, id: number, emissionCount: number, claim?: { controller: string; offset: number }): void {
   14. 14 file.ephemeral.inFlight.delete(id);↑ no longer waiting on the world
   15. 15 recordTransition(file, "runtime", "DISCHARGE.TABLE", "resolve-discharge", { id, emissions: emissionCount, ...(claim ?? {}) });↑ the change is written into the journal
   16. 16}

   AGPL-3.0-onlyThe Lab's demonstration environment, as this fragment ran it (build 043cc8b). The code may change, and may differ from the code of a working machine.

   Nest VM core, incubated in the CoAgnes garden · build 043cc8b (2026-09-21) · this file last changed in de79653 (2026-09-11)

2. 221A note enters the log as #41LOG · append

   a wave is settlingengine: next: #41membrane: waiting at #41

   1. #0a listener
   2. #1a doer
   3. #2listener: the charter
   4. #3doer: the author
   5. #4listener: charter seen
   6. #5listener: blueprint seen
   7. #6doer: the planner
   8. #7listener: assess · charter
   9. #8listener: assess · result
   10. #9doer: the evaluator
   11. #10the charter wanted
   12. #11the blueprint
   13. #12readiness
   14. #13readiness
   15. #14a request: a charter
   16. #15the charter proposed
   17. #16the charter defined
   18. #17readiness
   19. #18readiness
   20. #19a request: a Cell
   21. #20the seed
   22. #21the Cell is open
   23. #22inner listener
   24. #23inner doer
   25. #24the Cell's context
   26. #25return listener
   27. #26return doer
   28. #27the return address
   29. #28the person's words
   30. #29readiness
   31. #30the private result
   32. #31the result, marked
   33. #32readiness
   34. #33a request: assess
   35. #34assessment proposed
   36. #35the Cell assessed
   37. #36the decision
   38. #37the Cell sealed
   39. #38the export
   40. #39readiness
   41. #40a request: present again
   42. #41a note, from the Cellnewenginemembrane
   43. ·end of the log

   What	before		after
   records in the log	41	→	42
   #41	—	→	a note, from the Cell · note.given

   The answer is written as #41 — a note.given, written not by a person but by the controller, with where it came from stamped in it.

   Where it happens appendEmissions()Vol. 02 §4.1 · Vol. 03 §1

   The only function that adds records to the log. Each new record gets the next free number, at the end.

   Specification

   Vol. 02 §4.1 · Vol. 03 §1

   Code

   appendEmissions() in core/registers/append-emissions.ts, line 14: the new record gets the next free number

   Journal

   #40 · LOG · append · offset: 41, kind: domain.fact · by engine

   Picture

   records in the log: 41 → 42

   1. 1// The one LOG writer (Vol. 02 §4.1, Vol. 03 §1): emissions become tuples by
   2. 2// receiving the next dense absolute offset — `base + window.length` — and
   3. 3// nothing else ever grows the log. Each append is journalled under the
   4. 4// ambient context, so a batch born of a propagated tuple carries that
   5. 5// tuple's offset as its cause — the cube's provenance line (ADR-002).
   6. 6
   7. 7import type { WaveEmission, WaveTuple } from "../wave/gate";
   8. 8import type { RegisterFile } from "./register-file";
   9. 9import { recordTransition } from "./record-transition";
   10. 10
   11. 11export function appendEmissions(file: RegisterFile, emissions: readonly WaveEmission[]): void {
   12. 12 const engine = file.registers.engine;
   13. 13 for (const emission of emissions) {
   14. 14 const tuple: WaveTuple = { ...emission, offset: engine.base + engine.window.length };↑ the new record gets the next free number
   15. 15 engine.window.push(tuple);↑ it is added at the end of the log
   16. 16 recordTransition(file, "engine", "LOG", "append", {↑ the change is written into the journal
   17. 17 offset: tuple.offset,
   18. 18 kind: tuple.kind
   19. 19 });
   20. 20 }
   21. 21}

   AGPL-3.0-onlyThe Lab's demonstration environment, as this fragment ran it (build 043cc8b). The code may change, and may differ from the code of a working machine.

   Nest VM core, incubated in the CoAgnes garden · build 043cc8b (2026-09-21) · this file last changed in f36e70d (2026-08-18)