host/blog--publish-activity now emits the CANONICAL seam shape {:verb :actor :object <cid>
:object-type :slug :category :delta :id}: :object is a content-addressed REFERENCE (the CID, not an
inlined dict), :id the dedup identity, :slug+:category the domain fields the DAG reads. Consumers
reconciled — the on-publish trigger matches :verb+:object-type; publish-ctx reads top-level
:category+:slug. Added host/blog--activity->erl: marshals the canonical activity → next/'s Erlang
proplist for the Erlang runner adapter (RA) — defined + tested, unused until RA so the reconcile is
complete and RA's bridge is ready. (:ts/:prev omitted — no clock primitive in the host; deferred.)
LIVE PROOF: published on blog.rose-ash.com → /flows fired validate+notify with the canonical
activity. blog 209/209, full host conformance 597/597.
P0 COMPLETE: the synchronous publish workflow runs end-to-end on the live host through the
substrate-agnostic seam, durably, in the canonical shape, with the RA marshaller staged. RA (Erlang
runner) + TA (fed-sx transport) plug in next without touching the DAG or the wiring.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The driver now persists each effect record to the blog store (string-keyed to dodge the keyword/
persist top-level split), and host/blog-load-flowlog! rebuilds the in-memory log on boot (wired into
serve.sh after load-edges!). So /flows survives a restart — closing the P0.3 gap.
LIVE PROOF: published a post on blog.rose-ash.com → /flows showed validate+notify → RESTARTED the
container (in-memory log lost) → /flows STILL showed them, reloaded from the durable store.
Round-trip also covered by a conformance test (persist → clear → reload → identical). blog 208/208,
full host conformance 599/599. Note: whole-list rewrite per effect — fine at P0 volume, cap/rotate later.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Publishing a post now fires the on-publish behavior DAG through the seam. host/blog--{transport
(activity log), triggers (on-publish: create+article → publish-DAG), driver (records each effect in
the flow log), publish-engine (behavior/make-engine over the four adapters + the execute-fold runner
+ publish-ctx), fire-publish!, maybe-publish!}. Both write handlers (form-submit POST /new,
edit-submit POST /:slug/edit) detect the draft→published TRANSITION (fire-once) in the handler body
and run behavior/process. GET /flows renders the flow log (the effect-as-data the driver dispatched).
LIVE PROOF: logged in + POST /new on blog.rose-ash.com → /flows shows 'validate' + 'notify' (the
publish-DAG branched on the default urgent category), driven end-to-end by the real behavior engine.
Every piece is a seam adapter — swapping the runner for Erlang (RA) or the transport for fed-sx (TA)
federates this same wiring unchanged.
blog 207/207 (+4 P0.3), full host conformance 595/595. GAP: flow log is in-memory (P0.3b = persist).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Per the user: the execute-fold-vs-artdag split from P0.2 is a capability SNAPSHOT, not a permanent
boundary. artdag MAY grow +{effect,branch,each} node-kinds; business logic then migrates onto it to
inherit the DAG-engine superpowers — content-addressed memoization (recompute only on input-CID
change), optimize (fuse/dedup/dce), schedule, and above all FEDERATION (a flow result reused across
peers by content-id — the federation vision, for free). The capability model makes the migration
seamless (same DAGs + seam; the runner just advertises more). Named the real design work: dynamic
control in a static DAG (branch prunes a path); effect nodes non-cacheable vs pure nodes memoized.
Demand-driven (phase AX); execute-fold stays the lean default for cheap synchronous flows. Annotated
the P0.2 finding + flows.sx header so the finding doesn't harden into dogma.
Doc/comment-only.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The hypothesis test. FINDING: a synchronous business flow expresses NATURALLY as an EXECUTE-FOLD
composition (host/execute.sx: seq/effect/alt — the category branch IS 'alt'), NOT an artdag
DATAFLOW DAG (which has no control flow). So 'business logic = art-dag' holds at the ABSTRACTION
(both content-addressed op-DAGs) and is REFINED at the vocabulary: the synchronous control-flow
runner is the execute-fold (caps {effect,branch,each}); artdag is the dataflow sibling. Two
instances of one thing, run very differently — exactly the framing.
lib/host/flows.sx: capability typing (host/flow--node-cap/required-caps derive a DAG's capability
set from its node vocabulary; effect→effect, alt→branch, each→each, wait→suspend), the execute-fold
seam runner (advertises {effect,branch,each}), and host/flow--bind (required ⊆ advertised → derive
the runner, else fail-fast). host/blog--publish-dag (the publish workflow) + publish-ctx.
Verified: publish-DAG required-caps = {effect,branch} → binds to the sync runner; runs →
newsletter→[validate,digest] / urgent→[validate,notify] / other→[validate,skip]; a node →
{suspend} → binds FAIL-FAST against the exec-runner (would need the Erlang runner, RA). Runner is
DERIVED, not chosen. flows 7/7, blog 203/203, full host conformance 591/591.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Folds in the sharpest refinement: business logic and art-dag are the SAME op-DAG structure,
differing only in the CAPABILITIES their nodes require — so the runner is DERIVED, not chosen.
A node declares :needs (wait→suspend, fan-out→parallel, heavy→offload); a runner advertises
:capabilities (op-table {effect,branch,each}; Erlang +suspend; celery-sx +parallel,retry,offload);
artdag/analyze computes a DAG's required set → its minimum runner; the binder checks required ⊆
runner-caps (fail fast). The sync/durable/distributed split falls out of the DAG (a {effect}-only
DAG runs with zero ceremony; a wait node auto-requires Erlang) — turning 'simple in SX / complex
in Erlang' from a judgment call into a derivable property. Removed the :runner hint from the type
binding; P0.2 gains the hypothesis test (natural-as-a-DAG? + flip-to-wait fails fast); runner
contract gains :capabilities; type-def editor can show the derived classification.
Doc-only.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The reframe updated the vision but left the P0 section stale + contradictory: P0.2/P0.3 still
described the Erlang-bridge-first path the reframe deferred; P0.1's activity ({:type :object-dict})
didn't match the seam's canonical activity ({:verb :object-cid}); the seam-contract section
predated the 2 enrichment passes (no status/dedup/pump). Coherence fixes:
- P0 rewritten around the seam + SX op-table runner (all-SX publish-DAG, local-SX registry,
in-process transport, host driver) — no Erlang/fed-sx.
- Erlang/fed-sx DEMOTED to explicit adapter phases: RA (durable Erlang runner wrapping next/
flow_dispatch) + TA (fed-sx transport wrapping next/ delivery). P3-federation folded into TA.
- canonical seam activity shape defined; P0.4 reconciles P0.1's next/-shaped activity + a marshaller.
- seam contract refreshed to behavior.sx (result {:status :effects :resume :error}, dedup
per-invocation, pump/async-completion, behavior 10/10); stray fragments + 9/9→10/10 cleared.
Doc-only.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
After review, the seam was only synchronous-complete; the durable/celery-sx runners couldn't
plug in cleanly. Additive fixes (pipeline unchanged): (1) :status branch in run-binding — 'done'
dispatches effects, 'suspended' records the flow + :resume (a durable runner holds it; completion
re-enters as a new activity via pump), 'failed' records + :error for retry/dead-letter. (2) richer
runner env — :ctx (per-activity, via engine :ctx-of) + injected :effects (external-read interfaces,
e.g. a deterministic fetch_followers). (3) dedup by content :id — a cycle is caught by identity,
not just the depth guard. (4) behavior/pump — drain transport.deliver for inbound (peer activities
+ async runner completions), sharing one trace so dedup spans the batch.
behavior 9/9 (+ suspended/failed/dedup/env/pump); full host conformance 580/580.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
lib/host/behavior.sx — the substrate-independent seam every runner/transport/registry/driver
plugs into. An engine bundles four dict-of-functions adapters (trigger-registry, runner,
transport, driver); behavior/process folds an ACTIVITY through the pipeline: emit → match
triggers → run each behavior DAG → dispatch each effect-as-data → recurse on new activities
(loop closure, depth-guarded at 8). Every stage injected, so the same DAG + engine run over the
synchronous op-table runner / Erlang durable / celery-sx / fed-sx transport unchanged.
Reference tests (mock adapters) prove the contract: publish→trigger→runner→effect flows; a
non-matching activity fires nothing (log complete, execution precise); an effect that emits a new
activity re-triggers (loop closes); an unbounded loop is depth-guarded (terminates). Wired into
conformance.sh + serve.sh MODULES. behavior 4/4; full host conformance 575/575.
Next: P0 supplies the REAL adapters (publish activity ← host/blog--publish-activity, local-SX
trigger, sync op-table runner over a publish-DAG, host driver) — same engine.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
celery-sx = one more runner on artdag/op-table-runner, not a Celery port: broker=persist KV,
workers=er-scheduler, result backend=content-addressed (dedup free), retries/replay=flow-on-
erlang, fan-out=artdag/schedule. ~few hundred lines of glue, zero packages, 'Celery the way it
should have been' on erlang-on-sx. DEMAND-DRIVEN (RX) — build when a DAG needs heavy compute /
long-running-retryable / cross-machine fan-out; the synchronous op-table runner covers P0.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Reframe after the user's insight, confirmed in code: artdag-on-sx already IS the substrate-
independent behavior engine — artdag/run injects the RUNNER (execution adapter: SX op-table /
Erlang / Celery), federation.sx injects the TRANSPORT (communication adapter: fed-sx / HTTP /
IPFS). Business logic = a content-addressed DAG; durability is a RUNNER capability (same DAG runs
eager or durable); deployment (subdomain service / peer / L1 worker) is placement. fed-sx+Erlang
is ONE adapter set, not the architecture. The type carries content-grammar + allowed-relations +
a behavior DAG. The prior fed-sx/Erlang framing is kept as one concrete first slice.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Three framing fixes after review: (1) the event source is object-level state changes, NOT just
CID deltas — relations write edge:* rows so they don't shift the CID; content/status → Create/
Update, relations → Add/Remove (ActivityPub-faithful). (2) verbs are TRANSITIONS (on-publish =
draft→published, fire-once, not every delta of a published post). (3) the hybrid flow split is by
DURABILITY not complexity — the execute-fold is eager/synchronous (no wait); suspend/timer/human
flows are the Erlang escape hatch. Plus: effects-as-data need a DRIVER (host, for P0); P0.2 must
gate on the transition + run in the handler body (VmSuspended/er-scheduler risk); P0.3 gets an
acceptance criterion; P3 flags the fed-sx delivery M2 blocker + the deferred actor model.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Business logic as federated composition-flows (plans/business-logic-fed-flows.md). P0.1: the
host describes a published post as a fed-sx activity — host/blog--publish-activity(slug) →
{:type "create" :actor "site" :id <CID> :object {:type "article" :slug :category}} — the
exact shape next/'s trigger machinery consumes (verified: next/tests/triggers_e2e.sh 10/10).
category (drives the flow branch: newsletter suspends / urgent fires / else skip) comes from
the "category" field-value, else the first tag, else "urgent". + host/blog--post-category.
Design decided: activity log = every CID delta (event source); triggers = declared subscriptions
(DefineTrigger); flows hybrid (SX composition for simple via the execute-fold, named Erlang flows
for complex); federated execution = Erlang (next/); the type carries content+relations+behavior.
blog 200/200 (+3: contract, category fallback, missing-post nil).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
