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fix(statusline): correct context percentage when switching models mid-session #1358

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fix(statusline): correct context percentage when switching models mid-session #1358

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21 changes: 21 additions & 0 deletions Releases/v4.0.3/.claude/statusline-command.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,27 @@ context_remaining=${context_remaining:-100}
total_input=${total_input:-0}
total_output=${total_output:-0}

# Model-aware context window correction. When switching between Opus (1M) and
# Sonnet/Haiku (200K) mid-session, Claude Code may report context_window_size
# from the session's starting model, not the current model. Use model_name to
# derive the expected window and recalculate context_pct against the right value.
_model_lower="${model_name,,}"
if [[ "$_model_lower" == *"opus"* ]]; then
_expected_ctx=1048576
elif [[ "$_model_lower" == *"sonnet"* ]] || [[ "$_model_lower" == *"haiku"* ]] || [[ "$_model_lower" == *"fable"* ]]; then
_expected_ctx=200000
else
_expected_ctx=""
fi
if [ -n "$_expected_ctx" ] && [ "$context_max" != "$_expected_ctx" ] && [ "$_expected_ctx" -gt 0 ]; then
if [ "$total_input" -gt 0 ]; then
context_pct=$(( total_input * 100 / _expected_ctx ))
elif [ "$context_max" -gt 0 ] && [ "$context_pct" -gt 0 ]; then
context_pct=$(( context_pct * context_max / _expected_ctx ))
fi
context_max="$_expected_ctx"
fi

# NOTE: Removed fallback that calculated context_pct from total_input + total_output
# when used_percentage was 0. total_input/output_tokens are CUMULATIVE session totals
# (like an odometer) — they can far exceed context_window_size. After /clear,
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