jig v1.9.0 — the transcript you can touch

jig v1.9.0 — the transcript you can touch

v1.9.0 is a UX batch: the transcript is now fully interactive — click
thinking, drag the scrollbar, unfold tools one stage at a time, read real
diffs — and the harness stops cutting turns short. It also removes every
harness-imposed output cap and fixes a provider error that killed turns after
1–3 messages.

Interactive transcript

• Thinking, per block. Click a thinking… line and only that reasoning
  block reveals itself; ^T still toggles everything at once.
• A real scrollbar. Proportional thumb on a faint track. Grab it and drag,
  or click the track to jump; scrolling back to the bottom re-engages
  follow mode.
• Tools are one line again. A finished tool shows a single header line
  with a faint ▸N marker. Click to unfold: 1st click a peek (6 lines),
  2nd more (24), 3rd full, 4th back to one line.
• Real diffs in edit cells. edit/write now attach a proper unified
  diff (LCS-based hunks, @@ bands, green adds / red dels) that the
  transcript renders instead of the model-facing hashline echo.

Composer

• Cursor no longer drifts. Word-wrapped input wrapped the visual column
  as chars % width, so the cursor slid left on every auto-wrapped line. It
  is now measured from the cursor's actual visual segment, and the input box
  height is counted with the same word-wrap it draws with.

Turn lifecycle

• Completion contract. The model closes finished work with
  <complete>…</complete> wrapping a one-paragraph summary of the changes.
  Without the closing tag the turn is continued, not accepted — an early
  stop (or a stream cut mid-thinking) no longer ends the turn silently. The
  harness re-prompts up to three times before accepting the stop.
• No more max_tokens caps. The default config no longer truncates
  responses: on OpenAI-shaped endpoints the field is omitted entirely
  (o-series gets max_completion_tokens only when a cap is set explicitly),
  and the Anthropic dialect — where the field is mandatory — uses the
  model's catalog maximum.
• Fixed 400 Invalid assistant message: content or tool_calls must be set. Empty assistant envelopes (left behind by a stream cut mid-reasoning)
  are dropped before they reach the wire, and the Anthropic serializer now
  filters unsigned thinking and merges consecutive same-role messages — both
  deterministically, so the KV-cache prefix stays byte-stable.

Validation

Full workspace gates were run for this release: cargo test (380+ tests),
clippy -D warnings, cargo fmt --check, jig prompt-lint, release build.
The KV-cache snapshot and cache-guard tests were updated for the serializer
changes and pass.

Install

Download jig.exe below (Windows x86_64) and put it on your PATH.