install.ps1 had three related problems that compounded into `hermes dashboard`
failing to boot on Windows with 'No module named fastapi':
1. UTF-8 BOM missing. Windows PowerShell 5.1 (the default on Windows 10/11,
which is what `irm | iex` runs under) reads files without a BOM as
cp1252. install.ps1 has em-dashes, arrows, check marks, etc. — PS 5.1
mangled them and the file failed to parse. Added UTF-8 BOM so PS 5.1,
PS 7, and the in-memory `irm | iex` path all read the file identically.
2. `uv pip install -e .[all]` had a single-tier silent fallback to bare
`.` on any failure, with `2>&1 | Out-Null` swallowing the error. Any
transient extras install failure (network hiccup, wheel build issue,
etc.) would drop every optional extra including [web], and the installer
would still print 'Main package installed'. Replaced with a four-tier
fallback (.[all] -> PyPI-only extras -> dashboard+core -> bare) that
prints output at every step and a targeted [web] verify+repair at the
end so `hermes dashboard` specifically is never silently broken.
3. tinker-atropos was installed unconditionally after the main install.
tinker-atropos/pyproject.toml pulls atroposlib and tinker from
git+https://github.com/... which can fail on locked-down networks,
flaky DNS, or rate-limited github.com and would half-install the venv.
install.sh already skipped it by default with a one-liner for users
who actually do RL training — install.ps1 now matches that behavior.
Parse-checked clean under Windows PowerShell 5.1.26100.8115
(5318 tokens, 0 parse errors).
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