# configuration/strings/resource.strings.ts > 224 lines of code and 11 definitions. Tree: Site tree Language: typescript Layer: product Canonical: https://banes-lab.com/anatomy/tree#file-configuration-strings-resource-strings-ts Source text: https://banes-lab.com/assets/sources/source.280bd15df24485f6bd99d9c5a22a2995d3f2cba149faa309c7668339e0abd4cf.generated.txt ## Definitions - `OWNERSHIP_SHAPE` (lexical_declaration, line 12) - `EVENT_SHAPE` (lexical_declaration, line 15) - `CORE_DIAGRAM` (lexical_declaration, line 18) - `LIFETIME_DIAGRAM` (lexical_declaration, line 21) - `EXCHANGE_DIAGRAM` (lexical_declaration, line 24) - `RELEASE_DIAGRAM` (lexical_declaration, line 27) - `STRUCTURAL_DIAGRAM` (lexical_declaration, line 30) - `CORE_SECTION` (lexical_declaration, line 33) - `EXECUTION_SECTION` (lexical_declaration, line 107) - `STRUCTURAL_SECTION` (lexical_declaration, line 172) - `RESOURCE_SECTIONS` (lexical_declaration, line 235, exported) ## Source ```typescript import { CORE_SECTION_ICON, EXECUTION_SECTION_ICON, STRUCTURAL_SECTION_ICON, } from "#configuration/icons/architecture.icons"; import { CORE_SECTION_ID, EXECUTION_SECTION_ID, STRUCTURAL_SECTION_ID } from "#core/ids/architecture.ids"; import { LAYER_FACE } from "@govlab/constants"; import type { Section } from "#types/document.types"; import { TYPESCRIPT_LANGUAGE } from "#configuration/constants/code.constants"; import { faceLink } from "#domain/converters/ontology.converter"; const OWNERSHIP_SHAPE = 'export interface Owned {\n readonly acquire: () => Handle;\n readonly release: (handle: Handle) => void;\n}\n\nexport interface Lifecycle {\n readonly init: () => void;\n readonly run: () => void;\n readonly shutdown: () => void;\n}\n\nexport const withOwned = (owned: Owned, use: (handle: Handle) => Result): Result => {\n const handle = owned.acquire();\n try {\n return use(handle);\n } finally {\n owned.release(handle);\n }\n};\n\nexport interface Bounded {\n readonly capacity: number;\n readonly evict: "lru" | "fifo";\n readonly items: readonly Item[];\n}'; const EVENT_SHAPE = 'export interface Emitted {\n readonly ordinal: number;\n readonly intent: Intent;\n}\n\nexport interface Child {\n readonly emit: (intent: Intent) => Emitted;\n}\n\nexport interface Parent {\n readonly subscribe: (react: (event: Emitted) => "accept" | "refuse") => Unsubscribe;\n}\n\nexport type Failure =\n | { readonly ok: true }\n | { readonly ok: false; readonly code: Code; readonly halts: boolean };'; const CORE_DIAGRAM = 'flowchart TB\n subgraph computation["Computation · what happens to data"]\n pure["pure functions · immutable · idempotent"]\n marked["uncertainty marked, never hidden"]\n end\n subgraph resource["Resource · where data lives"]\n owner["one owner · bounded lifetime"]\n symmetric["open then close · start then stop · guaranteed"]\n halt["invariant broken · halt"]\n end\n subgraph execution["Execution · control flow"]\n events["children emit · parents subscribe"]\n monotonic["append only · never retract"]\n snapshot["backtrack by reinstantiation"]\n end\n structural["Structural · applies to all three · observes itself"]\n resource -- observe --> computation\n computation --> execution\n resource --> execution\n execution -- feeds --> structural\n structural -- feedback --> execution'; const LIFETIME_DIAGRAM = "stateDiagram-v2\n [*] --> Acquired : the owner opens it\n Acquired --> InUse : initialise\n InUse --> InUse : use · one owner writes\n InUse --> Released : shutdown · by scope or explicit destroy\n InUse --> Halted : invariant broken · fail fast\n Halted --> Released : the owner still releases\n Released --> [*]"; const EXCHANGE_DIAGRAM = "sequenceDiagram\n participant Child\n participant Bus as Event bus\n participant Parent\n Child->>Bus: emit intent · ordinal 41\n Bus->>Parent: deliver\n Parent-->>Bus: accept\n Child->>Bus: emit intent · ordinal 42\n Bus->>Parent: deliver\n Parent-->>Bus: refuse · typed error, halts: false\n Note over Child,Parent: the child never calls the parent · the log only grows"; const RELEASE_DIAGRAM = 'flowchart TB\n resource["A resource is acquired"]\n who{"Who releases it?"}\n discipline["The developer remembering · it leaks"]\n structure["The structure · scope, a finally, an explicit destroy"]\n owner{"Exactly one owner?"}\n weak["Every other reference is weak or ephemeral"]\n shared["Shared ownership · ambiguity, then a leak"]\n resource --> who\n who -- discipline --> discipline\n who -- structure --> structure --> owner\n owner -- yes --> weak\n owner -- no --> shared'; const STRUCTURAL_DIAGRAM = 'flowchart TB\n classical["A classical principle · separation of concerns, simplicity, one responsibility"]\n sharpened["The practice that sharpens it · the whole system in view, compression, an invariant"]\n pair["One pair · the principle holds, the practice says how"]\n human["Human factors · bounded by what a developer can hold"]\n evolution["Evolution · state protected, room left, nothing built unneeded"]\n classical --> pair\n sharpened --> pair\n pair --> human\n pair --> evolution'; const CORE_SECTION: Section = { icon: CORE_SECTION_ICON, id: CORE_SECTION_ID, intro: `This section covers the split at the core of the canon, between what happens to data, ${faceLink(LAYER_FACE, "computation-core", "computation")}, and where data lives, a ${faceLink(LAYER_FACE, "resource-core", "resource")}. The split is the first question to ask of any unit, because the two halves answer the same question with different rules. Who releases a resource decides whether it leaks, as shown in who releases, and a lifetime runs from one owner to one release, as shown in a lifetime and typed in ownership as types.`, subsections: [ { blocks: [ { application: "In practice, every unit is sorted into computation or resource before it is designed. What computation produces is frozen, each variable is assigned once, and a computation carries no persistent state, so it can be replayed and its rollback restores meaning rather than bytes. Every resource has one owner and a lifetime bound to that owner's, every open is paired with a close and every start with a stop, and release happens by scope or by an explicit destroy rather than by the developer or the model remembering. Every cache and pool is bounded by a declared capacity and an eviction policy, and registered where it can be seen.", boundary: "The split does not let one rule stand in for the other. A computation is stateless while a resource is snapshotted before mutation, computed data is immutable while resource state is mutable but managed, and a broken resource invariant halts while a computation's uncertainty is marked and carried on.", cause: "A stateful thing treated as stateless leaks, because nothing owns its release, and a stateless thing treated as stateful drifts, because it acquires a lifetime nothing bounds.", decision: "Release is by structure rather than by discipline, and a unit is frozen rather than managed wherever it can be a computation.", failureMode: "A cache with no capacity grows until the process dies, a listener that is never unsubscribed fires against a component that was removed an hour ago, and both were written correctly by their authors.", kind: "lesson", principle: "For this reason computation is stateless and frozen, a resource has one owner and a bounded lifetime, and release is structural.", problem: "Most code mixes the two, so data that should have been frozen is mutated and handles that should have been owned are shared, and the leaks are found in production.", validation: "To check this, take any resource and name its owner and the structure that releases it. A resource with two owners, or with a release that depends on a developer, will leak, and the only open question is when.", }, { caption: "who releases", kind: "mermaid", text: RELEASE_DIAGRAM }, ], title: "What happens to data, where data lives", }, { blocks: [ { kind: "text", text: "The computation half is the canon's computation core read as one rule. Immutability freezes what a computation produces. Pure functions give it no effect but its return value, and referential transparency lets any call be replaced by its result. Determinism makes the same input give the same output, which is what makes repeatability and reproducibility properties rather than hopes, and testability follows from all of them at once.", }, { kind: "text", text: "Statelessness is the same rule seen from the outside. Nothing is retained between calls, so a computation can run anywhere and be replayed. Idempotency is its consequence at the edge, because a retry of a stateless step has one effect however many times it lands. Validation and verification are then cheap, since a frozen output can be compared against an expected one without a running system around it.", }, ], title: "The computation half", }, { blocks: [ { kind: "text", text: "Being reachable is not the same as being useful. A collector frees what nothing reaches and keeps what something still points at, so an architectural leak survives collection because it is reachable, as with a cache entry that will never be read, an observer on a dead subject, or a handle held by an injection container.", }, { kind: "text", text: "For this reason every non-owning reference is weak or ephemeral, hidden retention in injection, mapping and observer machinery is made observable and bounded, and anything that outlives a single call carries an initialise, a run and a shutdown. Graceful shutdown is the resource rule at the scale of a process. A long-lived component with no shutdown is a leak by construction, and the leak is a hole in the contract rather than a bug in the code.", }, { caption: "a lifetime", kind: "mermaid", text: LIFETIME_DIAGRAM }, { code: OWNERSHIP_SHAPE, kind: "code", language: TYPESCRIPT_LANGUAGE, title: "ownership as types" }, ], title: "The resource half", }, { blocks: [ { kind: "text", text: "Caching is where the two halves meet most often and where the split is most often lost. A cache holds computed data, so its entries are immutable, and it is a resource, so it has one owner, a declared capacity and an eviction policy. Cache poisoning by design is what happens when the first half is forgotten, and a cache with no capacity is what happens when the second is.", }, { kind: "text", text: "Configuration externalization is the same split at the boundary of the process. What the process reads at boot is a resource with one source and a validation at the door, and what it computes from that is frozen for the run. Environment parity follows from it, because the same computation over a different resource behaves the same, or the difference is in the resource and can be named.", }, ], title: "Where the halves meet", }, ], title: "Computation and resource", }; const EXECUTION_SECTION: Section = { icon: EXECUTION_SECTION_ICON, id: EXECUTION_SECTION_ID, intro: `This section covers ${faceLink(LAYER_FACE, "execution-core", "execution")}, the layer where the two halves meet, as shown in the core split. Execution has its own rules, each the refusal of one improvised join, and one exchange under those rules is shown in one exchange and typed in execution as types.`, subsections: [ { blocks: [ { application: "In practice, a child announces what happened as an event and the parent decides what to do with it, so the child never holds a reference to what reacts. A correction is appended as a new record that supersedes rather than edits history, and an earlier state is restored by reinstantiating from a snapshot rather than by patching in place. Ordering uses a monotonic sequence the system owns, never the host's clock. Every error is a typed value in the system's own vocabulary, each error is marked as halting or carried, and a guard that fails does so closed.", boundary: "Execution rules govern how computation and resources interact at runtime, and they do not decide what either half is. A resource that halts on a broken invariant is obeying the resource rule, and a computation that marks an uncertainty is obeying the computation rule. Execution only carries the result between them.", cause: "A callback couples a child to a parent it should not know, a retraction is a second path every reader must handle, a clock is a dependency on the host, and a sentence in an error is a contract no consumer can dispatch on.", decision: "The system owns the sequence and the vocabulary rather than borrowing the host's clock and prose.", failureMode: "A child calls back into its parent, the parent is replaced, and the child keeps calling into something that no longer exists, while the error that would have said so was a string no consumer parsed.", kind: "lesson", principle: "For this reason execution joins the halves through events rather than callbacks, appends rather than retracts, and treats errors as part of the language.", problem: "Control flow is usually improvised per call site, so the same two halves are joined a different way in every place they meet.", validation: "To check this, follow one event from the child that emits it to every parent that reacts, and one error from where it is raised to where it is handled. A callback that runs upward, a retraction, or an error handled by string comparison is a place where execution has no rule.", }, { caption: "the core split", kind: "mermaid", text: CORE_DIAGRAM }, ], title: "Events, growth, order, errors", }, { blocks: [ { kind: "text", text: "Event-driven architecture is the shape the first rule produces. Domain events are what a child emits, the publish/subscribe pattern is how a parent hears them without the child knowing who listens, and an event bus is the mechanism that carries them. The observer pattern is the same relation inside one process. Execution may counter-propose by emitting an intent a parent can refuse, which is asynchronous communication with the refusal kept explicit.", }, { kind: "text", text: "An append-only log is the growth rule as a store, and event sourcing is it as a whole architecture, where the current state is a fold over the events and a correction is a new event that supersedes. Backtracking is by snapshot and reinstantiation rather than by patching state in place, which is the memento pattern held as a rule rather than a trick.", }, { kind: "text", text: "Ordering is by a monotonic sequence or an append-only id, never a wall clock. A clock is a dependency on the host and a sequence is a dependency on nothing, which is why causality is tracked with Lamport clocks, vector clocks or hybrid logical clocks rather than timestamps, and why event ordering is a constraint the system owns. A happens-before relationship is derivable from a sequence and never from two clocks.", }, { caption: "one exchange", kind: "mermaid", text: EXCHANGE_DIAGRAM }, ], title: "Events and growth", }, { blocks: [ { kind: "text", text: "Errors are part of the language. Error handling uses the system's own vocabulary and the errors are machine-processable, so a consumer dispatches on an error rather than parsing a sentence. An inconsistent error model, one boundary raising and another returning a code, is the anti-pattern this rule refuses, and exception control flow is its twin.", }, { kind: "text", text: "A resource invariant that breaks fails fast and halts, because carrying on with a corrupt handle is worse than any crash. A computation that is uncertain marks the uncertainty and carries on, because temporary inconsistency in data is acceptable exactly while it is visible. Defensive programming is the wrong reflex here, and the practice that replaces it is described in fail at the boundary on the methodology page. Fail safe and fail secure are the same decision made once for a domain rather than per call site.", }, { code: EVENT_SHAPE, kind: "code", language: TYPESCRIPT_LANGUAGE, title: "execution as types" }, ], title: "Errors as language", }, ], title: "Execution joins the halves", }; const STRUCTURAL_SECTION: Section = { icon: STRUCTURAL_SECTION_ICON, id: STRUCTURAL_SECTION_ID, intro: `This section covers the ${faceLink(LAYER_FACE, "structural-core", "structural")} domain, which applies to all three cores and observes itself. Its principles are the classical ones, each paired with the practice the canon adds to it, as shown in principle and practice.`, subsections: [ { blocks: [ { application: "In practice, each classical principle is paired with the practice that makes it recognisable in a tree, and its violation is written as a shape a check can match. Where the pairing yields no shape, the principle is not yet held by anything.", boundary: "A pairing sharpens a principle and never replaces it. The classical name still carries the intent a reader recognises, and the practice only says how that intent shows in a tree. A practice with no principle behind it is a house rule, and a principle with no practice is held by nothing.", cause: "A principle stated without a shape gives a reviewer nothing to point at, so the disagreement moves to what the principle means in this file, and that is the argument the pairing settles in advance.", decision: "What a principle means in a file is settled in advance, as a shape, rather than at each review.", failureMode: "Two reviewers agree that a module should have one responsibility and disagree about whether this one does, because responsibility was never derived from anything either of them could point at.", kind: "lesson", principle: "For this reason a structural principle is a classical principle paired with the practice that makes it recognisable.", problem: "Classical principles are agreed at a level no check can reach, so what they mean in a given file is argued every time.", validation: "To check this, take any structural principle you hold and state, in one sentence, what a violation of it looks like in a file. If the sentence names a shape, the principle has its practice. If it names an opinion, the pairing is still missing.", }, { caption: "principle and practice", kind: "mermaid", text: STRUCTURAL_DIAGRAM }, ], title: "A principle and the practice that sharpens it", }, { blocks: [ { kind: "text", text: "Separation of concerns is paired with reasoning about the whole system, so one module holds one concern while the design is still read as one thing. Simplicity is paired with compression, because the simplest solution is a rule or a generator, never an enumeration, and a repeated shape is compressed by its type. A literal becomes a constant, a structure a composition, a behaviour one orchestrator, a fact one source. Do not repeat yourself is that compression named for the case of knowledge.", }, { kind: "text", text: "The single responsibility principle is derived from an invariant rather than a feature. The open/closed principle is met through few composable primitives, so extension arrives without editing what is tested. The Liskov substitution principle makes substitutable parts order-independent. The interface segregation principle cuts an interface by usage, and the dependency inversion principle addresses it by meaning rather than by location. Composition over inheritance is the practice all five share, because a composed part can be replaced and an inherited one cannot.", }, { kind: "text", text: "Code as data makes code, data and state one interchangeable structure, and homoiconicity is the degree to which a system has that property. One truth lives in versioned, queryable symbols, which is single source of truth with a location. Placement in a hierarchy reflects meaning, time is a logical sequence rather than a wall clock, and the system observes its own execution as data it can query, which is where introspection and observability meet.", }, ], title: "The pairs", }, { blocks: [ { kind: "text", text: `${faceLink(LAYER_FACE, "human-factors", "Human factors")} bound the whole by what a developer can hold. Related logic stays together, which is high cohesion read as a limit on attention. Complexity stays under a declared bound, and bounded nesting depth is one such bound made checkable. Uncertainty stops the work rather than passing silently. Internals are hidden but shipped with a live inspector, so encapsulation is traded against debuggability at a point the developer chose.`, }, { kind: "text", text: `${faceLink(LAYER_FACE, "evolution-principles", "Evolution")} says how the whole changes. Units are independent and swappable, with state protected before code. Features are added externally, through extension points, with room left deliberately unspecified. Nothing is built that nothing needs, which refuses speculative generality and premature abstraction, and what the system will not do is written down in architecture decision records rather than remembered. Evolutionary architecture with fitness functions is that domain held by checks rather than by review.`, }, ], title: "Beneath the core", }, ], title: "The structural domain", }; export const RESOURCE_SECTIONS: readonly Section[] = [CORE_SECTION, EXECUTION_SECTION, STRUCTURAL_SECTION]; ```