[pedapudi]

Redraws the harmonograf console's sequence story in the zicato design language with the corrected framing: the sequence view shows how the agents interact — who said what to whom, when.

Task 1 — vertical sequence diagram is now the recommended view

sequence.html is restructured so Option B (the vertical staff) is the RECOMMENDED, primary view, redrawn to read unambiguously as an agent-interaction sequence diagram: one vertical lifeline per agent (neutral, with a name chip), time flowing down, each message a horizontal connector from sender to receiver with an explicit arrowhead — solid for a call, dashed for a return — and the label above in the KIND hue. Activations hug the lifelines; the delegation opens a child band on the tester lifeline and returns; the approval is a gate; the failed check is the only red. Messages use a minimum-row-gap layout so a near-coincident call+return never overprint. The horizontal score becomes the explicit Gantt-companion alternative; the UML frame stays as the before.

Task 2 — directional transfer chord

Figure 11 in grammar.html (mountChord) is rebuilt so direction is obvious three redundant ways at once:

1. each agent's arc sector splits into a solid outbound half and a dashed inbound half;
2. each ribbon is an asymmetric teardrop — pinched at the source, broad at the target;
3. a source→target hue gradient plus a small arrowhead landing on the receiver's arc.

"Who talks to whom AND in which direction" is legible at a glance, and it stays legible even on belafonte-night where the ANSI kind hues collapse (direction carried by treatment, not hue). The same chord is incorporated into the sequence view as the communication-topology summary beside the time-ordered diagram.

Task 3 — information parity across the three compose proposals

Audited what each proposal surfaced from the session model and closed every gap so no proposal is missing what the others expose:

• A · observatory — sequence view now renders the corrected vertical diagram + topology chord (was the flat score).
• B · score — main is the corrected sequence diagram; the margin gains the topology chord, intervention ladder, plan reel (already had drift, interventions, heartbeat, fingerprint, DAG, strata in main).
• C · mission control — gains the sequence diagram, topology chord, plan DAG, plan strata, and judge heartbeat (already had gantt, drift, ladder, reel, fingerprints).
• The span inspector is now reachable in every proposal (A docks it in the rail drawer; B & C float it as an overlay), plus a ?span= deep-link.

Constraints / verification

Preserves the zicato design language, the 16-theme ANSI-sourced categorical system, and the KIND=hue / STATUS=treatment grammar. Standalone HTML/CSS/vanilla-JS, no build, no network. Theme switch re-skins without a re-render; _embed.js ?only/?bare/?theme still works (smoke-tested on the 3 restructured sequence sections). Verified headless across monokai, paper, dracula, belafonte-night, and solarized-dark.

[pedapudi]

Merged directly into main as d4c4bcb. The branch was rebased onto #294 (portable console-UI serving), dropping the two now-superseded console-UI commits and replaying the zicato-console work on top — no conflicts, all tests green. Closing this PR and deleting the branch; the work lives on main.