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_switch.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+# A real switch - into the sandbox's own settings.json - and editing the preset
+# in use. --yes because the machine running the tests may well have Claude Code
+# sessions open; with --yes the CLI proceeds and leaves them alone.
+. "$(dirname "$0")/../lib.sh"
+start_fake
+S="$CLAUDE_CONFIG_DIR/settings.json"
+
+ready_preset ollama "$OLLAMA_URL"
+run_cm ollama --yes
+expect_rc 0 'switch to ollama'
+expect_eq "$(jget "$S" env.ANTHROPIC_BASE_URL)" "$OLLAMA_URL" 'base url written'
+expect_eq "$(jget "$S" env.ANTHROPIC_AUTH_TOKEN)" ollama 'placeholder token written'
+expect_eq "$(jget "$S" env.ANTHROPIC_DEFAULT_OPUS_MODEL)" qwen3-coder 'tier mapped'
+expect_eq "$(jget "$S" env.CLAUDE_CODE_MAX_CONTEXT_TOKENS)" 65536 'context declared'
+expect_eq "$(jget "$S" env.CLAUDE_CODE_ATTRIBUTION_HEADER)" 0 'extra env written'
+expect_eq "$(jget "$CM_ROOT/state.json" mode)" ollama 'state records the mode'
+expect_eq "$(jget "$CM_ROOT/health.json" preset)" ollama 'health.json follows'
+
+run_cm anthropic --yes
+expect_rc 0 'switch back to anthropic'
+expect_eq "$(jget "$S" env.ANTHROPIC_BASE_URL)" '' 'gateway env removed'
+expect_eq "$(jget "$S" env.CLAUDE_CODE_ATTRIBUTION_HEADER)" '' 'including the extra env'
+
+# The preset in use: a tier edit re-applies without asking about sessions.
+set_state openrouter default
+run_cm preset set default sonnet test/model-c --force
+expect_rc 0 'a tier edit on the active preset re-applies'
+expect_no_out 'refusing to switch while sessions are running' 'without the sessions prompt'
+expect_eq "$(jget "$S" env.ANTHROPIC_DEFAULT_SONNET_MODEL)" test/model-c 'and reaches settings.json'
+
+run_cm preset set default opus anthropic/claude-opus-5 --force
+expect_rc 1 'the cost guard still refuses an Anthropic model'
+expect_out 'saved, but re-applying the active preset failed' 'and says the edit was saved'
+
+finish