feat(statusline): show context-token usage below the buddy

[skpalan]

What

Adds a small context-token readout under the buddy in the status line, e.g.:

   /^\
  /\_/\
 ( ×   ×)
 (  ω  )
 (")_(")
    BBQ
  77.3k 7%      ← new: current context tokens + % of the model's window

How

The status line script already received Claude Code's status JSON on stdin but discarded it (cat > /dev/null). This captures it instead and:

1. Reads transcript_path + model.id from the status JSON.
2. Greps the last usage block in the transcript JSONL and sums input_tokens + cache_read_input_tokens + cache_creation_input_tokens to approximate the live context size.
3. Picks the denominator from the model id — 1m/[1m] → 1,000,000, otherwise 200,000 — and renders <tokens> <pct>%, centered under the name.

Safety / compatibility

• Degrades silently. No transcript, no usage block, or empty stdin → no line is added, so behaviour is unchanged when the data isn't there.
• Touches only the two existing insertion points (stdin drain + the name-line append); the server-rendered frame pipeline is untouched.
• bash -n clean; verified rendering against a synthetic transcript on both 1M and 200k models.

Open question for maintainers

It's currently always-on. Happy to gate it behind a showTokens flag in config.json (and a /buddy statusline tokens on|off toggle) if you'd prefer it opt-in — let me know and I'll add it.

[ramarivera]

Hey @skpalan — thanks for this fix! The only thing blocking it from getting CI + review is the DCO check: the commit(s) are missing a Signed-off-by line.

Quick fix from your branch:

git commit --amend -s --no-edit   # single commit
# or, for multiple commits:
git rebase --signoff origin/main
git push --force-with-lease

Once DCO goes green we can run CI and get this reviewed — it's a small, wanted change.

🤖 Created with the help of AI (Claude Fable 5).