[bitnom]

Every bdi user on current herdr gets blank lane names. bdi is a herdr plugin, and herdr 0.9.5 reports an agent's name in name and the row it draws in terminal_title. The collector still asks for display_agent and title, both declared #[serde(default)], so a current herdr silently deserializes them to None — no error, no warning, just nothing.

Measured on a live 49-pane fleet: display_agent: null and title: null on all 49 panes, while herdr agent list reported a name and a terminal title for every one of them. Captions fall back to nothing, so the dashboard reads as an idle fleet.

Change

• Agent gains name and terminal_title; Pane gains name.
• title falls back to terminal_title, so captions draw again.
• The agent's name lands in Pane::name, deliberately not in display_agent: that field means "the pane's own claim about the bead it is working" (collect/agents.rs:199), and a lane name is not such a claim. Overloading it would present a lane name to the join as a candidate bead id.
• Additive: a provider that still sends display_agent or title keeps working.

Tests

• New: a_pane_takes_its_name_and_title_from_herdrs_current_fields, parsing herdr's current wire shape (name, terminal_title, kind: "path" session).
• Updated: the fixture-based "pane that reported nothing" row now carries the title herdr reports for it — the fixture already held terminal_title, nothing was reading it.

Verification

cargo test --lib on this branch produces the identical failure set to main: 42 failures, all present before this change and all environment-dependent (e.g. the collect::changes tests panic with bdi is watching: Os { code: 2, kind: NotFound } on a machine without that socket), 2444 passing. No new failures.

Diff

3 files, +45/−5.

[GraemeF]

Thank you for this, and for such a clear write-up! It's the first pull request beady-eye has had from outside, and it's a good idea: a pane that reports nothing does draw a bare row today, and herdr has better text to offer. I'd love to get it in. A few changes first, and then a couple of nitpicks you're welcome to ignore.

One correction to the premise, because it shapes the rest. herdr 0.9.5 still sends display_agent and title. Its AgentInfo at the v0.9.5 tag has name, title, terminal_title, terminal_title_stripped and display_agent side by side, and each one is left out when it is unset. title and display_agent are set with herdr pane report-metadata, and name is set by herdr agent start or herdr agent rename. So the nulls on your fleet mean those panes never reported metadata or were never named. bdi was reading the right fields, and those fields were simply empty.

That makes this a new fallback for the caption rather than a fix, and I think it's a welcome one.

Changes I'd ask for

1. Please use terminal_title_stripped rather than terminal_title. The raw title carries the agent's animated spinner glyph, such as ✳ or ◑, so the caption would flicker from frame to frame. herdr strips that glyph in the other field and sends no update when only the spinner moves.
2. Please put name into the caption too, or leave it out. As the patch stands, Pane::name is set but nothing reads it. herdr accepts a name wherever it accepts a pane id, so a name is a better last resort than the pane id. The order I'd suggest is: state label, then title, then terminal_title_stripped, then name, then the pane id.
3. Please fix the test comment that says the older fields are gone, since they are still there.
4. Please update the caption rule in docs/design.md. It currently says the caption is the state label, then the title, then the pane id. If you'd rather not touch the spec, say so and we'll do it.

Nitpicks, take them or leave them

• I'd keep title and the terminal title as separate fields on Pane, and pick between them in Pane::caption, rather than folding one into the other in Agent::into_pane. That way the whole precedence lives in one place.
• The tests use invented names, such as dunwich and paths under /tmp/bdi-ground/. It would be nice if the new test values followed that style.

Thanks again. Happy to help with any of this.