fix: add encoding="utf-8" to Path.write_text() calls (P1)

[AlexFucuson9]

Summary

Add explicit encoding="utf-8" to 39 Path.write_text() calls across 16 files.

Problem

Path.write_text() without encoding defaults to system locale. On Windows (cp1252), this corrupts non-ASCII content. Same root cause as PLW1514 but for the write path.

This is the write-side counterpart to the read_text() encoding fix (PR #56115).

Changes (16 files, 39 instances)

File	Count
tools/skills_hub.py	8
hermes_cli/service_manager.py	5
hermes_cli/container_boot.py	5
gateway/run.py	5
hermes_cli/profiles.py	3
gateway/delivery.py	2
hermes_cli/main.py	2
agent/copilot_acp_client.py	1
tools/web_tools.py	1
tools/xai_http.py	1
gateway/slash_commands.py	1
gateway/dead_targets.py	1
gateway/platforms/qqbot/adapter.py	1
hermes_cli/gateway.py	1
hermes_cli/banner.py	1
hermes_cli/uninstall.py	1

Testing

All 16 files pass py_compile verification. Zero duplicate encodings.

[tonydwb]

LGTM — explicit encoding='utf-8' for Path.write_text() across 16 files. This is a defensive fix for non-UTF-8 locales (Windows especially). Each change adds the encoding parameter to a write_text call — no behavioral difference on UTF-8 systems, but prevents UnicodeDecodeError on systems with non-UTF-8 default encoding. File count is 16 (borderline) but the changes are mechanical and safe.

[tonydwb]

Code Review Summary

Verdict: LGTM

Gates read-dedup and staleness detection to local backend only. Prevents false positives on remote backends where host mtime is meaningless.

Looks Good

• _is_host_local_env cleanly checks both active environment and config fallback
• Read-dedup correctly skips on remote backends (prevents serving stale content)
• Staleness warning correctly skips on remote backends (prevents false positives)
• Comprehensive test coverage: 6 tests covering local, remote, config fallback, and exception cases

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Reviewed by Hermes Agent

[teknium1]

Thanks for the focused cross-platform cleanup. The current-main call sites still use locale-default Path.write_text()—for example, agent/copilot_acp_client.py:734 and gateway/delivery.py:360—so the central premise remains valid. The explicit UTF-8 arguments are mechanically appropriate.

Suggested changes

• Please add one focused non-ASCII persistence regression test. This PR modifies no test files, and GitHub currently reports no checks for the branch. A representative cache or delivery path would validate the Windows-specific behavior described by the change.
• When salvaging, reapply against current main: 11 touched files changed since the PR base, including gateway/run.py, hermes_cli/main.py, hermes_cli/profiles.py, tools/skills_hub.py, and tools/web_tools.py. The tools/web_tools.py hunk is correctly a stale-comment correction; the underlying writer already uses encoding="utf-8" on current main at tools/web_tools.py:509.

Automated hermes-sweeper review.

[teknium1]

Merged via PR #71078 — your commit was cherry-picked onto current main with your authorship preserved in git log (rebase merge). Your 5-PR series (#50655 was authored under your earlier account, #54241, #56385, #66856, #65440) formed the backbone of the class-wide close-out: 68 of the 139 bare sites came from your commits, and the campaign's structure followed your directory-by-directory split. The remaining 71 sites were swept on top and a CI linter rule now prevents regressions. Thanks for the sustained, methodical work on this class.