[t3dotgg]

The release linux-x64 tsc is 47.8 MB. Go's typescript@7.1.0-beta tsc is 24.5 MB. About 5 MB of ours is symbol tables (.symtab, .strtab) that Go strips from its release build (-ldflags "-s -w").

This PR changes the release recipe in two ways:

• Strip the Linux and macOS tsc after all checks.
  • Linux uses strip --strip-all. A readelf -lW guard fails the step if the program headers move.
  • macOS uses Apple's strip -x, then runs --version to catch a bad arm64 signature.
  • The unstripped tsc is kept as the unstripped-tsc-<platform> artifact (90 days) for perf work.
  • This is not a cargo profile strip: a profile change changes -C metadata, and the PGO use build then silently matches no profile.
• Identical code folding on both Linux PGO builds: rustup's rust-lld with --icf=all. build-pgo.sh gets an opt-in PGO_RUSTFLAGS, because it sets RUSTFLAGS itself.

Measured on a testbox with main's recipe (linux-x64):

	bytes
before	47,838,008
icf only (unstripped artifact)	47,566,232 (-271,776)
shipped (icf + strip)	42,546,304 (-5,291,704, -11.1%)

• Single-thread instructions: icf is 0.00% against a same-profile base. Cycles and dbook-lan wall are at noise level.
• Output: equal on 6 projects in both modes, and pgo-train.sh compare gives the same output on 1,993 files.
• Not tested off CI: the linux-arm64 icf link and the darwin strip. This PR's release.yml run (PR mode, no publish) is the first test of both.

Do not merge yet:

• A stripped tsc prints panic frames as <unknown> in the API panic answer (api/session_p1.rs:2367) and in GOPORT_TRACE output. A follow-up lane prints frame addresses and the build-id there, so the unstripped artifact can name them. It should land first.
• This changes the published binary, so it needs Theo's approval.

Part of the binary-size work (state notes size-plan-decisions-2026-10-25, size2a-result-2026-10-25).

This PR was made by Claude Opus 5.5 in Claude Code.

🤖 Generated with Claude Code

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