test: separate "Windows has no such thing" from "we got it wrong"

[xizhuomengcontin]

Ten tests fail on Windows. The suite said nothing about which of them mean anything, and that is
the real cost — with ten permanently red, the eleventh arrives invisible.

This sorts them into three piles and writes the reason for each one where the next person will
look for it.

One was ours

api.test.ts asserted result.runDir contains .orca/runs — spelling the separator itself, so
it only ever held on POSIX. The API returns a real path, and on Windows that is .orca\runs\run_….
Now built with join. Fixed, not skipped.

Five are things Windows does not have

test	what is missing
opencode still produces the env it was recorded with	$SHELL — opencode passes the host's through, Windows sets none
trusts the run CA through the child environment	HTTPS_PROXY and https_proxy are one case-insensitive variable
forwards SIGTERM to the child	SIGTERM — no signal to forward
round-trips a nested tree byte for byte	the execute bit
round-trips a symlink as a symlink	unprivileged symlink()

Two are worth spelling out:

The execute bit is guarded inline rather than skipping the test, because the byte-for-byte
round trip either side of it is exactly as meaningful on Windows. Git itself gives up here
(core.fileMode=false). The consequence is real and the comment says so: a run recorded on POSIX
and forked on Windows gets its scripts back without +x.

The symlink test fails in its own setup — symlink() needs Developer Mode or elevation, so
materialize is never reached. The gap on Windows is therefore unmeasured, not proven. Left
as a red test it read like a restore bug, which it is not.

The $SHELL one is skipped rather than filtered on purpose: the fixture is a record of what the
adapter produced on the platform it was captured on, and filtering the key list would make it
stop meaning that.

Four stay red, deliberately

None of these is a platform difference. Two have since been diagnosed and fixed in follow-ups —
a security hole (#96) and a suite that was calling a real gateway (#97) — which is the argument for
sorting the list rather than making it green.

ca.test.ts — the run CA's private key at 0600. Not a test artifact. On Windows chmod only
toggles the read-only attribute, so ca.key is readable by every account on the box, and that key
signs certificates the agent is told to trust for the duration of the run. Fixed in #96, with
Windows ACLs, rather than riding along here.

doctor.test.ts — the shell shim. A .cmd shim cannot be exec'd by CreateProcess, so the
POSIX interception mechanism does not apply and shell capture needs a different one on Windows.
A real gap in what orca captures, not in how it is tested.

The two fork tests (compare, e2e) — an unexplained hang diagnosed, and fixed in
#97. They do not hang. Under a full suite they reach the 30s timeout; run alone, each fails in
under two seconds with a 401 from a host the test never named. replayCommand resolves its
upstream through readConfig() with no environment argument, so it reads the real
~/.config/orca: --upstream-anthropic was overridden, openai was not, and it fell through to
my own configured gateway. Nothing platform-specific, and invisible to CI, which has no config.
This PR leaves them red; #97 turns them green.

Measured

Same machine, same build, quiet:

	main	this branch
failed	10	4
passed	2440	2428
skipped	40	58

The four are the same four on both sides — nothing new, nothing masked.

prettier --check, tsc --build --force, scripts/conformance.mjs (63 events, 0 failures) and
scripts/fidelity.mjs --check (0 regressions) are all clean.

🤖 Generated with Claude Code

[orcacode-review]

🐳 OrcaCode Review

✅ No findings — nothing to flag in this PR. Great work!

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