--- title: "Foundations · Agentic Atlas" description: "Foundations: the prerequisite substrate and residence test." canonical: "https://agentic-atlas.dev/nodes/foundations" last-updated: "2026-08-19" --- # Foundations · Agentic Atlas [← the survey](https://agentic-atlas.dev/atlas) 1. concept Foundations Hook the prerequisite substrate and residence test Thesis Foundations holds prerequisites rather than moves, and a node lives there only if understanding it is required to properly apply the other families. Laws & fences - A skill is a trade: addressability, replayability, discoverability, a trigger contract, and a composable seam, paid for with a namespace slot, a line of attention, and a maintenance surface. - The residual clause is rejected; load-bearing content that fails the prerequisite test belongs inside the node that owns it, never here. - Each pillar left unheld breaks a named family silently: verifiers stack failure, discard keeps the mess, budgeting assumes the window persists, gates land downstream of effects. When to reach - Reach for it when a design inherits presuppositions it never argues, such as treating the model as a stateful colleague or reading a contract as enforcement. - Skip it for prices, moves, or mechanics; those are taught at context-economy, in the families that make the moves, and in the instances that own the mechanics. Provenance [foundations/why-it-matters](https://agentic-atlas.dev/nodes/foundations#why-it-matters) · v1.0.2 Addresses atlas_cards foundations 2. [ Baseline Skill ](https://agentic-atlas.dev/nodes/baseline-skill) 3. [ LLM Dispatch ](https://agentic-atlas.dev/nodes/llm-dispatch) 4. [ The Contract ](https://agentic-atlas.dev/nodes/contract-documentation) 5. [ The Context Economy ](https://agentic-atlas.dev/nodes/context-economy) 6. [ Statelessness ](https://agentic-atlas.dev/nodes/statelessness) 7. [ Effect Discipline ](https://agentic-atlas.dev/nodes/effect-discipline) 8. [ Verification Asymmetry ](https://agentic-atlas.dev/nodes/verification-asymmetry) 9. [ The Contract Keystone ](https://agentic-atlas.dev/nodes/the-contract-keystone) 10. field notes - “the altitude above the single skill (N skills, compounding costs)” Verification AsymmetryThe Contract Keystone unfold the map fold the map The card, in place · its connections drawn edges from atlas_links foundations On this plate [why-it-matters](https://agentic-atlas.dev#why-it-matters)[definition](https://agentic-atlas.dev#definition)[model-and-claims](https://agentic-atlas.dev#model-and-claims)[scope-and-boundaries](https://agentic-atlas.dev#scope-and-boundaries)[implications-the-consequence-map](https://agentic-atlas.dev#implications-the-consequence-map)[evidence-the-test-s-track-record](https://agentic-atlas.dev#evidence-the-test-s-track-record)[relationships](https://agentic-atlas.dev#relationships)[lineage](https://agentic-atlas.dev#lineage)[open-questions-todo](https://agentic-atlas.dev#open-questions-todo) [relationships](https://agentic-atlas.dev#relationships) Every section is addressable on its own. Read only the ground you need. ## Why it matters [](https://agentic-atlas.dev#why-it-matters) why-it-matters.md Two problems, one family. Every other family teaches a **move**, and every move presupposes facts it never argues: what a [skill](https://agentic-atlas.dev/glossary/skill) minimally *is*, that the model holds nothing between calls, that a documented [contract](https://agentic-atlas.dev/glossary/contract) is persuasion rather than enforcement, that checking a result is cheaper than producing it, that a discarded run must not have changed the world. Left unstated, the presuppositions fail silently — designs inherit the stateful-colleague error, verifiers stack failure instead of compounding reliability, "discard" quietly means "keep the mess." And a family *named* foundations attracts everything that feels basic. Without an admission rule it decays into a junk drawer — the residual home for material that merely lacked a better one. ## Definition [](https://agentic-atlas.dev#definition) definition.md ### The prerequisite residence test *(settled 2026-07-05, foundations grilling)* A node lives in Foundations **iff understanding it is required to properly apply the other families.** Two corollaries: - **The residual clause is rejected.** "Baseline info that doesn't fit elsewhere" is the junk-drawer test, not this one. Load-bearing content that fails the prerequisite test belongs *inside the node that owns it*, never here. *(First eviction: the shared-workspace stub — its channel amendment dissolved into [LLM Dispatch](https://agentic-atlas.dev/nodes/llm-dispatch), its governing law into [The Contract](https://agentic-atlas.dev/nodes/contract-documentation).)* - **The curriculum role is a consequence, not the definition.** Prerequisites are what you teach first — so Foundations naturally opens the masterclass — but a node earns residence by being presupposed, not by being introductory. ## Model and claims [](https://agentic-atlas.dev#model-and-claims) model-and-claims.md ### What a skill buys — the floor every family stands on A skill is a **trade**. Bought: **addressability** (a named handle you invoke on purpose), **replayability** (capture intent once, invoke repeatedly across sessions), **discoverability** (it shows up in the skill list), a **[trigger contract](https://agentic-atlas.dev/glossary/trigger-contract)** (the description says when it fires), and a **composable [seam](https://agentic-atlas.dev/glossary/seam)** (other things can build on the name + contract). Paid: a **namespace slot**, a **line of attention** (the description stays resident so the model can route — the cost [The Context Economy](https://agentic-atlas.dev/nodes/context-economy) prices as propagation scope), and a **maintenance surface** (something now exists to keep correct). This enumeration is root material because every family presupposes it: each pattern in the tree is a way of making the trade pay better — [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill) is the trade at its smallest, and the *the altitude above the single skill (N skills, compounding costs)* is the trade at scale, where N slots compound. A skill that doesn't earn its slot is a bad trade however well it is built. ### The residents — five pillars, the keystone, the baseline The family settled at **five pillars + the keystone + the baseline** *(2026-07-05; both then-contested residents passed the test)*. Each earns residence its own way: - **The baseline artifact** — [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill): the reference shape (name + description + body) every later pattern is a structural diff against. Prerequisite because a diff needs its base. - **Two [primitives](https://agentic-atlas.dev/glossary/primitive)** — motivation-agnostic substrates the strategies *wield* rather than apply: [The Contract](https://agentic-atlas.dev/nodes/contract-documentation) (the seam) and [LLM Dispatch](https://agentic-atlas.dev/nodes/llm-dispatch) (the parent-child execution edge). Prerequisite because every family's move creates seams, crosses actor boundaries, or both — and pays off only when they are contracted. - **Three premises** — facts to internalize, not moves to make: - [Statelessness](https://agentic-atlas.dev/nodes/statelessness) — the window is the entire state, re-shipped every call; the fact the context-engineering arithmetic and the verification family's recovery moves both derive from. - [Effect Discipline](https://agentic-atlas.dev/nodes/effect-discipline) — which recovery moves a dispatch's effects leave legal; presupposed by verification's discard, persistence's artifacts, and control flow's [gate](https://agentic-atlas.dev/glossary/gate). - [Verification Asymmetry](https://agentic-atlas.dev/nodes/verification-asymmetry) — checking ≪ doing, for the covered portion of intent, on external rungs only; presupposed directly everywhere, because every family checks seams. - **The keystone** — [The Contract Keystone](https://agentic-atlas.dev/nodes/the-contract-keystone): the argument assembled from the pillars. The contract is the possibility condition of checking, the asymmetry its affordability condition, effect discipline the legality of the recovery move. Not another pattern — the reason the library exists. ## Scope and boundaries [](https://agentic-atlas.dev#scope-and-boundaries) scope-and-boundaries.md The test's price is strictness. Each admission is a standing claim that *every* other family depends on the node — so the burden of proof sits with admission, and the family stays small on purpose. What Foundations refuses on principle: prices (taught at [The Context Economy](https://agentic-atlas.dev/nodes/context-economy)), moves (taught in the families that make them), and mechanics (storage, staging layouts — instances, not substrate). The refusals cost cross-references; they buy a root that stays true as the tree grows. ## Implicationsthe consequence map [](https://agentic-atlas.dev#implications-the-consequence-map) implications-the-consequence-map.md The test read backwards: which family breaks, and *how it breaks*, when a pillar goes unheld. *(The arrow list settled 2026-07-05; the failure readings name each arrow's silent failure — relocated from Relationships and sharpened 2026-08-02.)* - **Verification ← the asymmetry + the contract + statelessness's feature face.** Unheld: there is nothing declared to check against, and checking isn't known to be affordable — verifiers stack failure instead of compounding reliability. - **Persistence ← effect discipline + the contract + statelessness.** Unheld: artifacts outlive the run unowned — "discard" quietly means "keep the mess." - **Context engineering ← statelessness's cost face.** Unheld: the stateful-colleague error — budgeting as if the window persisted, so the re-shipping bill is never priced. - **Control flow ← effect discipline.** Unheld: gates placed downstream of effects they can no longer revoke. - **Composition, externalization, distillation ← the contract's seam.** Unheld: their moves multiply seams, and an uncontracted seam moves work around without making any of it checkable. ## Evidencethe test's track record [](https://agentic-atlas.dev#evidence-the-test-s-track-record) evidence-the-test-s-track-record.md An admission rule is evidenced by what it discriminates, and this one has run three times with non-default outcomes *(all 2026-07-05, foundations grilling)*: - **One eviction.** The shared-workspace stub failed the test and dissolved — its channel amendment into [LLM Dispatch](https://agentic-atlas.dev/nodes/llm-dispatch), its governing law into [The Contract](https://agentic-atlas.dev/nodes/contract-documentation). This is the externally checkable item: the material demonstrably lives at its two destinations, not here. - **Two contested admissions.** Both then-contested residents passed under live challenge, not by default; their residence arguments stand in *Model and claims*. - **One demotion.** The curriculum role was argued as the family's definition and survived only as a consequence — the test cut a plausible framing, not merely weak content. ## Relationships [](https://agentic-atlas.dev#relationships) relationships.md - **Children:** [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill) (with the `tell-me-a-joke` exemplar and its flavor sidecar), [The Contract](https://agentic-atlas.dev/nodes/contract-documentation), [The Contract Keystone](https://agentic-atlas.dev/nodes/the-contract-keystone), [LLM Dispatch](https://agentic-atlas.dev/nodes/llm-dispatch), [Statelessness](https://agentic-atlas.dev/nodes/statelessness), [Effect Discipline](https://agentic-atlas.dev/nodes/effect-discipline), [Verification Asymmetry](https://agentic-atlas.dev/nodes/verification-asymmetry). - **Where the prices are taught — not here.** The price arithmetic lives at [The Context Economy](https://agentic-atlas.dev/nodes/context-economy) (Context engineering › statics; moved out of Foundations 2026-07-02). Foundations holds the substrate *fact* — statelessness — and economy derives the arithmetic from it. ## Lineage [](https://agentic-atlas.dev#lineage) lineage.md The uses relation (Parnas, "Designing Software for Ease of Extension and Contraction", 1979): A uses B when A's function depends on a correct B, so a useful subset holds B without A and none holds A without B. The residence test is that relation over ideas rather than programs; its rejected residual clause is coincidental cohesion (Stevens, Myers & Constantine, 1974) refused by name. Nothing links against a premise, so an unheld one fails silently. ## Open questions / TODO [](https://agentic-atlas.dev#open-questions-todo) open-questions-todo.md - **Vocabulary boundary:** *addressability* and *replayability* currently have only two claimants, this node and baseline-skill, so they remain ordinary prose rather than glossary terms. A third independent claimant would change that classification. The relationships ledger Evidence-bearing references ## Relationships Every connection keeps the section where it was found. The map above orients; this ledger carries the evidence. ### Outbound references 23 1. in-slice · occurrence 1 [LLM Dispatch](https://agentic-atlas.dev/nodes/llm-dispatch) the parent-child execution primitive; serial, parallel, joined, or fire-and-forget Evidence: [Definition](https://agentic-atlas.dev/nodes/foundations#definition) · occurrence 1 2. in-slice · occurrence 2 [The Contract](https://agentic-atlas.dev/nodes/contract-documentation) expectations at a seam, from informal prose to enforced structure Evidence: [Definition](https://agentic-atlas.dev/nodes/foundations#definition) · occurrence 2 3. in-slice · occurrence 1 [The Context Economy](https://agentic-atlas.dev/nodes/context-economy) **statics** — the price list: denominations, the quality curve, cost classes, time value Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 1 4. in-slice · occurrence 2 [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill) the skill-packaging *Hello World* and reference shape for skill-facing nodes Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 2 5. undisclosed · occurrence 3 Undisclosed relationship the altitude above the single skill (N skills, compounding costs) Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 3 6. in-slice · occurrence 4 [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill) the skill-packaging *Hello World* and reference shape for skill-facing nodes Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 4 7. in-slice · occurrence 5 [The Contract](https://agentic-atlas.dev/nodes/contract-documentation) expectations at a seam, from informal prose to enforced structure Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 5 8. in-slice · occurrence 6 [LLM Dispatch](https://agentic-atlas.dev/nodes/llm-dispatch) the parent-child execution primitive; serial, parallel, joined, or fire-and-forget Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 6 9. in-slice · occurrence 7 [Statelessness](https://agentic-atlas.dev/nodes/statelessness) each turn is conditioned on retained history again; logical reinjection yields a cost face and an explicit-state recovery face Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 7 10. in-slice · occurrence 8 [Effect Discipline](https://agentic-atlas.dev/nodes/effect-discipline) the precondition under "discard is cheaper than repairing" Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 8 11. in-slice · occurrence 9 [Verification Asymmetry](https://agentic-atlas.dev/nodes/verification-asymmetry) why checking ≪ doing lets verification work at all; the ladder + coverage, and the three failure modes (coverage exhaustion / discrimination collapse / quantifier inversion) Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 9 12. in-slice · occurrence 10 [The Contract Keystone](https://agentic-atlas.dev/nodes/the-contract-keystone) contract ↔ verification ↔ re-dispatch Evidence: [Model and claims](https://agentic-atlas.dev/nodes/foundations#model-and-claims) · occurrence 10 13. in-slice · occurrence 1 [The Context Economy](https://agentic-atlas.dev/nodes/context-economy) **statics** — the price list: denominations, the quality curve, cost classes, time value Evidence: [Scope and boundaries](https://agentic-atlas.dev/nodes/foundations#scope-and-boundaries) · occurrence 1 14. in-slice · occurrence 1 [LLM Dispatch](https://agentic-atlas.dev/nodes/llm-dispatch) the parent-child execution primitive; serial, parallel, joined, or fire-and-forget Evidence: [Evidence](https://agentic-atlas.dev/nodes/foundations#evidence-the-test-s-track-record) · occurrence 1 15. in-slice · occurrence 2 [The Contract](https://agentic-atlas.dev/nodes/contract-documentation) expectations at a seam, from informal prose to enforced structure Evidence: [Evidence](https://agentic-atlas.dev/nodes/foundations#evidence-the-test-s-track-record) · occurrence 2 16. in-slice · occurrence 1 [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill) the skill-packaging *Hello World* and reference shape for skill-facing nodes Evidence: [Relationships](https://agentic-atlas.dev/nodes/foundations#relationships) · occurrence 1 17. in-slice · occurrence 2 [The Contract](https://agentic-atlas.dev/nodes/contract-documentation) expectations at a seam, from informal prose to enforced structure Evidence: [Relationships](https://agentic-atlas.dev/nodes/foundations#relationships) · occurrence 2 18. in-slice · occurrence 3 [The Contract Keystone](https://agentic-atlas.dev/nodes/the-contract-keystone) contract ↔ verification ↔ re-dispatch Evidence: [Relationships](https://agentic-atlas.dev/nodes/foundations#relationships) · occurrence 3 19. in-slice · occurrence 4 [LLM Dispatch](https://agentic-atlas.dev/nodes/llm-dispatch) the parent-child execution primitive; serial, parallel, joined, or fire-and-forget Evidence: [Relationships](https://agentic-atlas.dev/nodes/foundations#relationships) · occurrence 4 20. in-slice · occurrence 5 [Statelessness](https://agentic-atlas.dev/nodes/statelessness) each turn is conditioned on retained history again; logical reinjection yields a cost face and an explicit-state recovery face Evidence: [Relationships](https://agentic-atlas.dev/nodes/foundations#relationships) · occurrence 5 21. in-slice · occurrence 6 [Effect Discipline](https://agentic-atlas.dev/nodes/effect-discipline) the precondition under "discard is cheaper than repairing" Evidence: [Relationships](https://agentic-atlas.dev/nodes/foundations#relationships) · occurrence 6 22. in-slice · occurrence 7 [Verification Asymmetry](https://agentic-atlas.dev/nodes/verification-asymmetry) why checking ≪ doing lets verification work at all; the ladder + coverage, and the three failure modes (coverage exhaustion / discrimination collapse / quantifier inversion) Evidence: [Relationships](https://agentic-atlas.dev/nodes/foundations#relationships) · occurrence 7 23. in-slice · occurrence 8 [The Context Economy](https://agentic-atlas.dev/nodes/context-economy) **statics** — the price list: denominations, the quality curve, cost classes, time value Evidence: [Relationships](https://agentic-atlas.dev/nodes/foundations#relationships) · occurrence 8 ### Inbound references 4 1. in-slice · occurrence 1 [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill#why-it-matters) the prerequisite substrate and residence test Evidence: [Why it matters](https://agentic-atlas.dev/nodes/baseline-skill#why-it-matters) · occurrence 1 2. in-slice · occurrence 4 [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill#model-and-claims) the prerequisite substrate and residence test Evidence: [Model and claims](https://agentic-atlas.dev/nodes/baseline-skill#model-and-claims) · occurrence 4 3. in-slice · occurrence 1 [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill#scope-and-boundaries) the prerequisite substrate and residence test Evidence: [Scope and boundaries](https://agentic-atlas.dev/nodes/baseline-skill#scope-and-boundaries) · occurrence 1 4. in-slice · occurrence 1 [Baseline Skill](https://agentic-atlas.dev/nodes/baseline-skill#relationships) the prerequisite substrate and residence test Evidence: [Relationships](https://agentic-atlas.dev/nodes/baseline-skill#relationships) · occurrence 1 [↑ back to the top](https://agentic-atlas.dev#content) [← the survey](https://agentic-atlas.dev/atlas) Node foundations · corpus 31de4cb · Catalog revision 35263c4c415da742953d0462804fb14424e2244dae4c63efd27e468988de70ab