# Coordination > Every algorithm contract in this domain is listed with its position on the derivation loop, its intent and invariant, the flow it walks and its productions as a… Page: Ontology · Algorithms Canonical: https://banes-lab.com/ontology/algorithms#algorithms-domain-coordination Listed in [Ontology · Algorithms](https://banes-lab.com/api/pages/ontology/algorithms.md), after [Context verification](https://banes-lab.com/ontology/algorithms/algorithms-domain-context-verification.md) and before [Test coverage](https://banes-lab.com/ontology/algorithms/algorithms-domain-test-coverage.md). Every algorithm contract in this domain is listed with its position on the derivation loop, its intent and invariant, the flow it walks and its productions as a grammar. Each record also shows what it composes and is composed by, which forces and principles it answers to, what grounds it and what it grounds, and an exemplar where the record carries one. The diagram shows what composes what inside the domain. Relations diagram What composes what inside this domain. ```mermaid flowchart LR n_convergence_walk["Convergence Walk"] n_invocation_join["Invocation Join"] n_duplicate_disposition_walk["Duplicate Disposition Walk"] n_lifetime_resolution["Lifetime Resolution"] ``` ### Convergence Walk - Domain: [coordination](https://banes-lab.com/ontology/algorithms/algorithms-domain-coordination.md) - Tier: [process](https://banes-lab.com/records/vocabulary/domain-tier-process.md) - Stage: [commit](https://banes-lab.com/records/stage/commit.md) - Axis: [representation](https://banes-lab.com/records/reasoning/axis-representation.md) - Math type: [computation](https://banes-lab.com/records/reasoning/math-type-computation.md) - Yields: procedure Details Intent Take a venue from its opening to the archive in a fixed order, so the question of whether a decision is made and the question of whether it is built are answered by two surfaces. Invariant A venue leaves the active surface only once its outcome is absorbed, and it leaves by moving to the archive, never by deletion. Flow ```text OpenVenue → HoldVenue → SignOutcome → CloseOutcome → AbsorbWork → ArchiveVenue ``` Productions ```bnf ConvergenceWalk ::= "→" "→" "→" "→" "→" ArchiveVenue ::= "moved_with_positions" ``` Composes none Forces [control_coordination](https://banes-lab.com/records/force/control-coordination.md), [observability_traceability](https://banes-lab.com/records/force/observability-traceability.md) Principle [Independent Lifetime Axes](https://banes-lab.com/records/architecture/independent-lifetime-axes.md) Grounds none Before ```text A discussion is closed once every party signs, so the ruling stands, the gate turns green and the change the ruling implied is never built. ``` After ```text open with an exit condition → hold, failing the pipeline → sign, one own line per participant → close, outcome written to the surviving documents → absorb, a checklist with an owner per item that lands → archive, the venue moved with every position intact ``` How it is checked Checked by the coordination member's venue, archive and writer checks Population Every venue closure, run start, duplicate set and surface lifetime a coordination topology carries Freshness A verdict stands until a venue, a run declaration, a copy of a fact or a lifetime declaration changes Refusal The coordination checks refuse a venue closed without its outcome absorbed, a closure missing its extraction, and a writer outside the sanctioned set Observation Each closure, run and copy compared against the declarations that govern it Evidence None, because the catalog states this check as a class, so a watched run belongs to each system that adopts it Authoritative side The declared schema and lifetime of each surface, which every closure, run and copy conforms to Depends on Not answered Shape it refuses Not answered ### Invocation Join - Domain: [coordination](https://banes-lab.com/ontology/algorithms/algorithms-domain-coordination.md) - Tier: [process](https://banes-lab.com/records/vocabulary/domain-tier-process.md) - Stage: [derive](https://banes-lab.com/records/stage/derive.md) - Axis: [reasoning](https://banes-lab.com/records/reasoning/axis-reasoning.md) - Math type: [logic](https://banes-lab.com/records/reasoning/math-type-logic.md) - Yields: boolean Details Intent Decide for each caller whether a live run already answers its question, joining by reading when one does and starting by declare-then-read ordering when none does. Invariant A joiner writes nothing and enters no collision comparison, and a starter writes its entry before it reads the set of live runs. Flow ```text Caller → CoverageTest → JoinByRead → DeclareEntry → ReadLiveSet → StartVerdict ``` Productions ```bnf InvocationJoin ::= "→" "→" "|" "→" "→" StartVerdict ::= "proceed" | "yield" ``` Composes none Forces [control_coordination](https://banes-lab.com/records/force/control-coordination.md), [state_transaction](https://banes-lab.com/records/force/state-transaction.md) Principle [Read-Time Join](https://banes-lab.com/records/architecture/read-time-join.md) Grounds none Before ```text Every caller of a shared measurement starts its own run, so two runs over one question collide and each writes a report. ``` After ```text caller → a live declared scope covers the question: join, read the published result and its standing, write nothing → none covers it: start, write the entry, then read the set → the earlier stamp proceeds, the other exits without writing ``` How it is checked Checked by the coordination member's venue, archive and writer checks Population Every venue closure, run start, duplicate set and surface lifetime a coordination topology carries Freshness A verdict stands until a venue, a run declaration, a copy of a fact or a lifetime declaration changes Refusal The coordination checks refuse a venue closed without its outcome absorbed, a closure missing its extraction, and a writer outside the sanctioned set Observation Each closure, run and copy compared against the declarations that govern it Evidence None, because the catalog states this check as a class, so a watched run belongs to each system that adopts it Authoritative side The declared schema and lifetime of each surface, which every closure, run and copy conforms to Depends on Not answered Shape it refuses Not answered ### Duplicate Disposition Walk - Domain: [coordination](https://banes-lab.com/ontology/algorithms/algorithms-domain-coordination.md) - Tier: [process](https://banes-lab.com/records/vocabulary/domain-tier-process.md) - Stage: [derive](https://banes-lab.com/records/stage/derive.md) - Axis: [reasoning](https://banes-lab.com/records/reasoning/axis-reasoning.md) - Math type: [set-theory](https://banes-lab.com/records/reasoning/math-type-set-theory.md) - Yields: set | boolean Details Intent Walk a duplicated fact in order, enumerating its copies, counting the distinguished ones, reading each derivation edge's period, choosing the disposition and checking which consumer each copy reaches. Invariant A collapse follows only a direction exactly one distinguished copy supplies, and a copy across a one-shot edge is diagnosed rather than rewritten. Flow ```text EnumerateCopies → CountDistinguished → ReadPeriods → ChooseDisposition → CheckDelivery ``` Productions ```bnf DuplicateDispositionWalk ::= "→" "→" "→" "→" CountDistinguished ::= "direction" | "cycle" | "undeclared" ChooseDisposition ::= "nothing_owed" | "comparator_owed" | "diagnose_and_repair_source" ``` Composes none Forces [semantic_consistency](https://banes-lab.com/records/force/semantic-consistency.md), [correctness_verification](https://banes-lab.com/records/force/correctness-verification.md) Principle [Period-Decided Disposition](https://banes-lab.com/records/architecture/period-decided-disposition.md) Grounds none Before ```text A fact stated in several places is collapsed toward whichever copy looks authoritative, and the copies written once against an earlier state of the source are overwritten. ``` After ```text enumerate every copy any consumer reaches → count the distinguished copies: one gives a direction, none refuses as a cycle, more than one refuses as undeclared → read each edge's period → deliver: add the copy the population is missing ``` How it is checked Checked by the coordination member's venue, archive and writer checks Population Every venue closure, run start, duplicate set and surface lifetime a coordination topology carries Freshness A verdict stands until a venue, a run declaration, a copy of a fact or a lifetime declaration changes Refusal The coordination checks refuse a venue closed without its outcome absorbed, a closure missing its extraction, and a writer outside the sanctioned set Observation Each closure, run and copy compared against the declarations that govern it Evidence None, because the catalog states this check as a class, so a watched run belongs to each system that adopts it Authoritative side The declared schema and lifetime of each surface, which every closure, run and copy conforms to Depends on Not answered Shape it refuses Not answered ### Lifetime Resolution - Domain: [coordination](https://banes-lab.com/ontology/algorithms/algorithms-domain-coordination.md) - Tier: [process](https://banes-lab.com/records/vocabulary/domain-tier-process.md) - Stage: [see](https://banes-lab.com/records/stage/see.md) - Axis: [analysis](https://banes-lab.com/records/reasoning/axis-analysis.md) - Math type: [set-theory](https://banes-lab.com/records/reasoning/math-type-set-theory.md) - Yields: set Details Intent Resolve the lifetime of the unit an operation targets from the file's declared default and the declared divergence of its section, reading each axis separately and never from the path. Invariant Every decision a mechanism takes about a surface resolves from a declared lifetime, and a surface that declares nothing is undeclared rather than defaulted. Flow ```text Surface → FileDefault → SectionDivergence → ResolvedAxes ``` Productions ```bnf LifetimeResolution ::= "→" "→" "→" ResolvedAxes ::= "retention" "," "mutability" "," "removal_authority" ``` Composes none Forces [control_coordination](https://banes-lab.com/records/force/control-coordination.md), [model_governance](https://banes-lab.com/records/force/model-governance.md) Principle [Independent Lifetime Axes](https://banes-lab.com/records/architecture/independent-lifetime-axes.md) Grounds none Before ```text A mechanism decides what it may do to a surface from the shape of its path, so a retired surface under a working folder is swept like a live one. ``` After ```text surface → the file's declared default on each axis → each section's declared divergence → the resolved retention, mutability and removal authority for the unit the operation targets → an undeclared surface stays undeclared ``` How it is checked Checked by the coordination member's venue, archive and writer checks Population Every venue closure, run start, duplicate set and surface lifetime a coordination topology carries Freshness A verdict stands until a venue, a run declaration, a copy of a fact or a lifetime declaration changes Refusal The coordination checks refuse a venue closed without its outcome absorbed, a closure missing its extraction, and a writer outside the sanctioned set Observation Each closure, run and copy compared against the declarations that govern it Evidence None, because the catalog states this check as a class, so a watched run belongs to each system that adopts it Authoritative side The declared schema and lifetime of each surface, which every closure, run and copy conforms to Depends on Not answered Shape it refuses Not answered ## Links to - [process](https://banes-lab.com/records/vocabulary/domain-tier-process.md) - [Commit](https://banes-lab.com/records/stage/commit.md) - [Representation](https://banes-lab.com/records/reasoning/axis-representation.md) - [Computation](https://banes-lab.com/records/reasoning/math-type-computation.md) - [Control coordination](https://banes-lab.com/records/force/control-coordination.md) - [Observability traceability](https://banes-lab.com/records/force/observability-traceability.md) - [Independent Lifetime Axes](https://banes-lab.com/records/architecture/independent-lifetime-axes.md) - [Derive](https://banes-lab.com/records/stage/derive.md) - [Reasoning](https://banes-lab.com/records/reasoning/axis-reasoning.md) - [Logic](https://banes-lab.com/records/reasoning/math-type-logic.md) - [State transaction](https://banes-lab.com/records/force/state-transaction.md) - [Read-Time Join](https://banes-lab.com/records/architecture/read-time-join.md) - [Set Theory](https://banes-lab.com/records/reasoning/math-type-set-theory.md) - [Semantic consistency](https://banes-lab.com/records/force/semantic-consistency.md) - [Correctness verification](https://banes-lab.com/records/force/correctness-verification.md) - [Period-Decided Disposition](https://banes-lab.com/records/architecture/period-decided-disposition.md) - [See](https://banes-lab.com/records/stage/see.md) - [Analysis](https://banes-lab.com/records/reasoning/axis-analysis.md) - [Model governance](https://banes-lab.com/records/force/model-governance.md)