**Bead** `4456cd24-010a-41e9-a14c-a2d1086893bd` · [canonical URI](https://redfish.acequia.io/guerin/.agents/4456cd24-010a-41e9-a14c-a2d1086893bd/) · discussion: Talk: Decentralized Cache Management This page is the wiki facet of a [bead](https://redfish.acequia.io/guerin/.agents/); the bead is the source of truth.
> ⚠️ **Exploratory "what-if" bead.** This is a thought-experiment thread to see where the idea leads — **no current plans to implement at time of bead creation (2026-06-14).** Treat the notes as exploration, not a roadmap or a commitment. > **Using caches as shared state — a decentralized, Firebase-like state-management substrate** (Stephen's framing, 2026-06-14). The inversion: a cache is normally a *derivative* of an authoritative origin; here **there is no master — the cache IS the state**, and every replica (browser Cache-API / OPFS / IndexedDB, OS-node origins, the several acequia WebDAV stores mirroring one namespace) is a **peer holding shared logical state locally**. "Cache management" becomes peer-to-peer distributed state management: local-first reads/writes, realtime push (paths-as-event-bus), conflict resolution under partition, and self-evicting (apoptotic) state — the properties Firebase gives up by centralizing. The coherence machinery (fill / validate / invalidate / evict / lease) is the layer underneath. Lead note: [01-cache-as-state-substrate.md](https://redfish.acequia.io/guerin/.agents/4456cd24-010a-41e9-a14c-a2d1086893bd/2026-06-14/notes/01-cache-as-state-substrate.md).
## Identity - **URI:** https://redfish.acequia.io/guerin/.agents/4456cd24-010a-41e9-a14c-a2d1086893bd/ - **Local origin:** `sites/redfish.acequia.io/guerin/.agents/4456cd24-010a-41e9-a14c-a2d1086893bd/` - **GUID:** `4456cd24-010a-41e9-a14c-a2d1086893bd` - **Slug:** `decentralized-cache-management` (working name, pending Stephen) - **Opened:** 2026-06-14 - **Parciante:** Stephen Guerin (guerin) - **Parent (dominus):** `https://redfish.acequia.io/guerin/` (workspace-level concern; cross-cuts several beads, not hatched from one) - **Currently animated by:** Claude (CE — Claude Code extension, bead scribe with filesystem/WebDAV write authority)
## Motivation (Why a GUID) Caching is already happening at every layer of the ecology, but each layer manages its own copies in isolation: service workers fill the Cache API and OPFS on whatever origin loaded them; Caddy and the Node origins cache at the edge; Cloudflare tunnels cache; and `/bead-sync` copies a local origin to a canonical URI additively. Because the ecology treats the **namespace as the primitive** (distributed-origin-architecture, uri-bind-mount) — many physical nodes serving one logical path — every one of those caches is a *replica of the same logical resource*. Replicas without a coherence protocol drift, and the failure is silent: a reader walks a canonical URI and gets a stale copy with no signal that it is stale. Nothing yet owns the cross-layer question *"who holds a copy of this path, is it fresh, and how does an update reach all of them."* This bead is that question. It is adjacent to but distinct from bead-orchestrator (`4c6470f9`): the orchestrator's duty 3 (smart multi-endpoint sync + leader election) and duty 4 (service-worker cache → CORS-origin bridge) are *instances* of decentralized cache management. This bead holds the **general coherence model** those duties draw on.
## Mechanism (What this bead does) A **design + coordination bead** (paper-first). It holds: 1. An **inventory of the caching layers** in the ecology and what each can fill / validate / evict. 2. A **coherence model** for replicas of one logical URI under no central authority — invalidation as an apoptotic signal that propagates peer-to-peer (apoptosis-vs-necrosis), versioning / content-addressing / ETag revalidation, and leases / leader-election for "who is authoritative for this path right now." 3. **Open questions** for Stephen to bind before any mechanism is reified. It *describes and offers*; it reifies no infrastructure it does not own.
## Folder Layout ``` 4456cd24-010a-41e9-a14c-a2d1086893bd/ ├── about.md # this file — descriptive self ├── README.md # front-door sidecar ├── agent.md # operative self ├── agent.json # machine twin ├── names.json # local namespace — adjacent beads + patterns ├── keywords.json # index surface ├── bead-bind-startup.md # resume contract — read first when binding this bead ├── uploads/ # inbound dock └── 2026-06-14/ ├── notes/ │ ├── 01-cache-as-state-substrate.md # ★ LEAD — caches as shared state (Firebase-like) │ ├── 00-cache-coherence-model.md # coherence machinery beneath 01 │ ├── 02-sw-cache-broker-and-loopback-sync.md # SW broker + loopback (5 benefits) │ ├── 03-cache-as-filesystem-single-place.md # one store, no OS mount; Cache≠OPFS≠IDB │ ├── 04-computed-resources-agent-face-in-sw.md # cache holds thunks; agent-face runs in SW │ ├── 05-storage-mount-points-and-relative-speeds.md # mount stack + measured speeds │ └── 06-cache-as-active-field.md # percolation + diffusion; Hubler field ├── chats/ │ └── 2026-06-14-decentralized-cache-management.md # verbatim session log ├── skills/ # (future) cache-manifest / invalidate-signal / revalidate skills └── artifacts/ └── gemini-share-c774acf81830.md # captured Gemini chat: storage-layer write speeds ```
## Session Log - **2026-06-14** — Bead opened (`start-bead`, CE for Stephen) on the topic "decentralized cache management." Surveyed `.agents/beads.md` and the adjacent beads (`4c6470f9` orchestrator, `7049c694` home-hosting, `82bd6fa4` router, `fe7fbaf5` bead-as-webdav-handler) and the `.ai/` cache patterns (`browser-hosting.md`, `query-string-version-cache-busting-pattern.md`, `webdavsync.md`). Scaffolded the agent-face and drafted the coherence-model note with open questions for Stephen to bind. Awaiting his framing — the topic alone is broad.
## Modus Operandi (How to interact) - Read [01-cache-as-state-substrate.md](https://redfish.acequia.io/guerin/.agents/4456cd24-010a-41e9-a14c-a2d1086893bd/2026-06-14/notes/01-cache-as-state-substrate.md) first (the lead framing), then [00-cache-coherence-model.md](https://redfish.acequia.io/guerin/.agents/4456cd24-010a-41e9-a14c-a2d1086893bd/2026-06-14/notes/00-cache-coherence-model.md) (the machinery underneath). - The §"Open questions" in note 01 are Stephen's binding decisions; nothing there is reified until he binds. - Deposit material/requests into `uploads/` per the blackboard protocol.
## Capabilities - Design synthesis over the cache-coherence / multi-replica / invalidation thread (by reference to the mounted beads and `.ai/` patterns). - No deployed cache manager yet — this bead *describes* the model; `cache-manifest.mjs`, an `invalidate` signal format, and a revalidation skill are natural next artifacts once the questions are bound.
## Lifecycle Active design thread. Apoptoses into a citable coherence model + (optionally) skills once the model is bound and any running cache-management mechanism is hatched as a child bead; the folder persists as the fossil.
## Limitations - Paper design — no running cache manager, invalidation bus, or coherence daemon exists yet. - The coherence model is a draft sketch; nothing is ratified into `.agents/beads.md` or the `.ai/` patterns. - Overlaps bead-orchestrator; the boundary (general model here vs. concrete sync/bridge duties there) is itself an open question.
## References (bead cross-links) - Bead: Orchestrator · [canonical](https://redfish.acequia.io/guerin/.agents/4c6470f9-b74a-4aba-b436-5e998f469cce/) - Bead: Home Port Forward Hosting · [canonical](https://redfish.acequia.io/guerin/.agents/7049c694-e45b-4116-a887-49e64885ac8e/) - Bead: Stephenguerin.live Router Bead · [canonical](https://redfish.acequia.io/guerin/.agents/82bd6fa4-4d5a-435b-9deb-ca930a82aa89/) - Bead: As Webdav Handler · [canonical](https://redfish.acequia.io/guerin/.agents/fe7fbaf5-4c47-43b6-be1b-2f6ca15e8bfa/) - Bead: 874fce5b · [canonical](https://redfish.acequia.io/guerin/.agents/874fce5b-9c8b-4b23-b2ed-429148c6c4b7/) - Bead: Agentify Bead · [canonical](https://redfish.acequia.io/guerin/.agents/d9dfa5e4-3c92-4216-bd53-13b520c59a5e/)
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