Loom: The Visible Scroll

Loom lets you read a Pattern revision as a declared Scroll: the stations it contains and the routes they permit. Use it to understand what a chosen workflow could do, then compare that declaration with the evidence of a particular Run in Orb. The current instrument is read-only.

Find the exact score

After Altar setup, open http://127.0.0.1:7134/loom. The catalogue retains bridge_chat@1 through bridge_chat@4 and delegated_rite@1 and delegated_rite@2; the rail pairs each title with its pattern_id@revision and marks the default, other active routes, and retained revisions.

Opening /loom selects the configured default and replaces the URL with its exact route. Without weaver.bridge, that is /loom/bridge_chat/1; configuring the Bridge capability selector selects /loom/bridge_chat/2; the public-note configuration selects /loom/bridge_chat/3. The Scout public-page profile selects /loom/bridge_chat/4. An exact revision link continues to open that retained score.

A direct link takes the form /loom/{pattern_id}/{revision}. Both parts are required: /loom/{pattern_id} is rejected. This lets a review name the revision it concerns instead of leaving its identity to a later selection.

Read identity, then possibility

Read the views together:

The workflow canvas and semantic outline derive the same stations and permissions, including declared wait loops, from the exact manifest. Zoom changes whole-Pattern and station detail; explicit buttons offer the same operation. The shared Svelte Flow renderer supplies a read-only computed layout. It subscribes to no execution and highlights no live station. A Run's retained evidence in Orb establishes which movements were observed.

Hover or keyboard focus on a canvas node reveals its meaning and identity without selecting it. Escape closes that preview. The same graph adapter serves Orb; a plain canvas background keeps the score readable, while declared kinds remain distinct from inferred agent or tool identities.

The selected station and its outline remain usable if the graph fails. No outgoing permission declared describes the manifest; it does not infer that execution has terminated. A failed score read offers Retry reading Pattern, preserving the requested exact revision instead of silently selecting another one.

The station's kind needs care when interpreting the score. A Spell is an independently identified semantic action, and the accepted grammar places its exact contract in a Scroll-local station. Current manifests do not yet carry independent Spell identity. In particular, the distinct glyph for a delegate station does not establish an independent Spell contract or provider-backed execution.

Compare it with a Run

An Invocation is the admitted Circle; casting performs its Scroll, and the Run is its durable ledger identity. Compare the declaration in Loom with Orb's retained evidence of traversal, accounting for any gaps and omissions there.

Orb can open a score with ?run={run_id} attached. That query supplies review context; it does not select the Pattern identity. Loom offers Return to Run in Orb only after the Run's pinned manifest validates and equals the entire registered score. Matching the digest, Pattern ID, and revision alone is insufficient. Loom also checks that the separately fetched displayed score still has the validated digest. The return preserves the selected event or delegated-job hint. Invalid, unavailable, or mismatched Run context is shown explicitly. Selecting another Pattern discards the Run query.

The fixed trusted source-browser journey checks the exact bridge_chat@2 score and keyboard return to its Run. It does not qualify the planned editor, every graph interaction or the shared renderer's cross-engine lifecycle gate.

The planned editor

Editing, proposal, publication, execution, and layout changes belong to the future design. The Loom workflow views record tracks which parts of that design have been implemented.

Future charcoal drafts and grey Spell placements would first produce inert candidates and redacted resolution reports. Until every exact placement passes Scroll admission, the whole candidate remains castable=false; no placeholder enters the executable Graph.

Follow ADR 15's editing gate for the future editor and Spellweaver for a candidate's passage to a published revision.

Reading direction

The exact revision, source registration, entry, station counts, and declared successors should be legible before the reader opens digest or source detail. The computed graph has an outline and station inspector beside or below it as space permits. That outline must answer the same question without pan or zoom gestures.

Judge every mark against the manifest. Both views share declared nodes and permission endpoints; station detail exposes incoming and outgoing permissions. Placement cannot supply a conditional edge label, station effect, independent Spell identity, or execution colour. Handles must not imply connecting, editing, publishing, or running this read-only score.

Acceptance case: open a retained exact revision with Run context, find all permitted successors and a return loop using the keyboard, then fail the graph. The outline must still answer the same question and preserve selection. Return to the original Orb event; selecting a different Pattern discards that context. Frontend owns this target and the shared renderer gates; installation does not establish the required cross-engine lifecycle receipt. State keeps that qualification separate from the available canvas.