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KRATOS c0254e3266 fix(tui): context-fill gauge for custom/local Ollama models + related fixes (#356)
* fix(tui): show the context-fill gauge for custom/local Ollama models

The colored context gauge (used/window · N%) only renders when Zero knows
a model's context window. It resolves that two ways: a curated remote
catalog (how Grok/hosted models are known), or live /v1/models discovery —
but parseModelsResponse only ever extracts id/description from that
response; OpenAI-compatible model listings don't carry context-window
metadata at all. A custom/local Ollama model tag (e.g. a locally-pulled
":cloud"-tagged model) has no curated-catalog entry to borrow one from
either, so it always resolved to an unknown window and the gauge silently
fell back to a bare token count with no color grading.

Ollama does expose this, just via a different, Ollama-native endpoint
(/api/show, not /v1/models) whose model_info map reports it under an
architecture-prefixed key like "qwen2.context_length". Added
DiscoverOllamaContextWindow (providermodeldiscovery) to probe it, wired
through an async command scoped to the local "ollama" catalog ID only
(not "ollama-cloud", a different hosted service this endpoint isn't
assumed to exist on) — fired from Init() for the provider active at
launch, and from switchProviderModel for a provider switched to
mid-session (which previously warmed no discovery at all for the new
provider, a separate gap this also fixes).

New tests: DiscoverOllamaContextWindow's endpoint construction and
model_info parsing (including a mixed-type model_info and a missing
*.context_length key), the discovery command's scoping to local Ollama
only, the Update() handler populating modelContextWindow's fallback, and
switchProviderModel warming discovery for the newly active provider.

Local only — not pushed. I can't run a live Ollama daemon in this
sandbox, so the actual /api/show request/response shape (verified against
Ollama's documented API, not a live instance) needs confirming against a
real daemon before this goes out.

* fix(tui): stop showing the token count twice next to the context gauge

contextWindowSegment (the gauge) and usageStatusSegment (the plain "N tok"
figure) both read the exact same value (latestUsageTokens) — the code
already suppressed the plain figure when the sidebar shows it ("the token
figure shows on both sides"), but never extended that same dedup to the
gauge. So as soon as a model's context window becomes known (e.g. after
the previous commit's Ollama fix), the footer showed the identical number
twice: once inside the gauge, once again right next to it.

Fixed by falling back to cost-only whenever the gauge is shown, same as
the sidebar-active branch already does.

* fix: check collect()'s deadline even while output keeps draining

The wait deadline in execSession.collect() was only checked in the branch
reached when drainString() returns empty. A background process producing
output continuously enough to keep the buffer perpetually non-empty could
theoretically starve that check forever, turning the caller's requested
timeout into an unbounded block regardless of yield_time_ms.

Investigated as part of a cross-provider "stuck" report (multiple sessions
across different models/providers all hanging on the same prompt, each
with a background terminal running and no forward progress). Could not
empirically reproduce a hang via a synthetic continuous-writer test under
Go's real scheduler — the reader won the race often enough in practice
that this doesn't appear to be the actual cause of those reports. Keeping
the fix regardless since it closes a real, if hard-to-trigger, gap: the
deadline is now checked in both branches, so continuous output can never
prevent collect() from returning within its requested window.
2026-07-01 20:48:50 +05:30
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