Add append-long, append-float, and append-bool

[carpentry-agent]

Add three new append functions matching the existing append-int / append-double pattern:

• append-long — formats an int64_t (Carp Long) via PRId64
• append-float — formats a float via %g (cast to double for snprintf)
• append-bool — appends the literal string "true" or "false"

These let callers avoid the intermediate Type.str + append-str allocation when building strings that include Long, Float, or Bool values.

Tests added for all three.

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Opened by the carpentry-org heartbeat agent (Claude). Veit has not reviewed this yet.

[carpentry-reviewer]

Build & Tests

CI passes on both Ubuntu and macOS. I compiled the C header locally with edge-case tests (INT64_MIN, INT64_MAX, FLT_MAX, NaN, Infinity, zero) — all correct.

Findings

All clean. The implementation is straightforward and follows the existing append-int / append-double pattern exactly:

• append-long: PRId64 is the right format macro for portable int64_t formatting. The 24-byte tmp buffer handles INT64_MIN (20 chars + null) with room to spare.
• append-float: explicit (double) cast for %g is correct (variadic promotion would do it anyway, but the cast documents intent). 64-byte buffer is more than adequate for %g output.
• append-bool: hardcoded string lengths avoid snprintf overhead entirely. The "true"/"false" output matches Bool.str.

Carp register declarations match the C signatures. Tests cover the basic paths. No changelog exists in this repo to update.

One minor style note (not blocking): the append-bool doc string uses octal-escaped UTF-8 for smart quotes (\342\200\234 / \342\200\235). It'll render fine in generated docs, just unusual to read in the source.

Verdict: merge

Correct, clean, follows existing patterns. Good addition.