Tests, licence, and the tooling to keep the repo consistent

A test suite with no dependencies beyond bash and the Python standard
library, run by one command:

  scripts/test.sh                    (or: make test)
  scripts/test.sh --windows [host]   adds the PowerShell suite over SSH

- tests/static.sh: script syntax, JSON validity, VERSION against the widget
  manifest and CHANGELOG, providers.json against the kinds, probes and checks
  the code implements (and ids that would shadow a command), qmllint and
  shellcheck when installed.
- tests/python: unit tests for cm-json.py - providers and the column contract
  bash depends on, the original three scaffolds byte for byte, every
  catalogue parser and the cache, session scan/dismiss/repair, rename,
  defaults, health, the cost guard.
- tests/cli: the CLI in a sandbox with its own HOME, CM_ROOT,
  CLAUDE_CONFIG_DIR and a file-only vault, against fake Ollama, LM Studio,
  keyed-gateway and proxy servers - preflight, presets, models, doctor, a real
  switch, sessions, and the key helper under a rename race.
- tests/windows: the same idea on a Windows host, with USERPROFILE pointed at
  a temp folder so the real install is never touched.

Also: MIT licence, CHANGELOG.md reconstructed from history, .editorconfig and
.gitattributes pinning LF everywhere (what the tree already is), and
scripts/bump-version.sh, since the version lives in two files and drifted
once before.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/cli/test_presets.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+# Preset lifecycle: names, new/rename/rm, and the per-provider default.
+. "$(dirname "$0")/../lib.sh"
+
+run_cm preset show ../../etc/passwd
+expect_rc 1 'a path is not a preset name'
+expect_out 'invalid preset name' 'and it says why'
+run_cm preset new .hidden
+expect_rc 1 'a leading dot is refused'
+run_cm preset new a/b
+expect_rc 1 'a slash is refused'
+
+run_cm preset new cheap
+expect_rc 0 'new copies default'
+expect_eq "$(jget "$P/cheap.json" provider)" openrouter 'the copy keeps the provider'
+run_cm preset new z2 --provider zai
+expect_out "from 'zai'" "--provider copies that provider's default"
+run_cm preset new z3 --provider zai default
+expect_rc 1 'copying across providers is refused'
+run_cm preset new b1 --provider ollama --blank
+expect_eq "$(jget "$P/b1.json" auth.token)" ollama "a blank preset carries its provider's token"
+run_cm preset new b2 --blank
+expect_rc 1 '--blank needs --provider'
+run_cm preset new x --provider foo
+expect_rc 1 'an unknown provider is refused'
+run_cm preset set nope opus x
+expect_rc 1 'setting a tier on a missing preset is refused'
+expect_no_file "$P/nope.json" 'and does not create it'
+
+run_cm preset rename cheap cheap2
+expect_file "$P/cheap2.json" 'rename moves the file'
+expect_no_file "$P/cheap.json" 'and removes the old name'
+run_cm preset rename cheap2 default
+expect_rc 1 'renaming onto an existing preset is refused'
+set_state openrouter cheap2
+run_cm preset rename cheap2 cheap3
+expect_eq "$(jget "$CM_ROOT/state.json" preset)" cheap3 'state follows the active preset'
+run_cm preset rm cheap3
+expect_rc 1 'the active preset cannot be deleted'
+set_state anthropic
+
+run_cm preset default openrouter cheap3
+expect_eq "$("$CM" preset default openrouter)" cheap3 'a chosen default is used'
+run_cm preset rename cheap3 cheap4
+expect_eq "$(jget "$CM_ROOT/defaults.json" openrouter)" cheap4 'the choice follows a rename'
+run_cm preset rm cheap4
+expect_eq "$(jget "$CM_ROOT/defaults.json" openrouter)" '' 'deleting clears the choice'
+expect_eq "$("$CM" preset default openrouter)" default 'and the built-in applies again'
+run_cm preset default openrouter zai
+expect_rc 1 "a default from another provider is refused"
+
+"$CM" preset new c5 >/dev/null 2>&1
+"$CM" preset default openrouter c5 >/dev/null 2>&1
+rm -f "$P/c5.json"
+expect_eq "$("$CM" preset default openrouter)" default 'a vanished choice falls back'
+
+run_cm preset rm z2
+run_cm preset rm zai
+expect_out 'that was the last zai preset' 'removing the last preset warns'
+
+finish