adaptive-lighting/openspec/changes/cdit-config-redesign/tasks.md

1. Foundation — const.py and manifest.json

• 1.1 Remove the 21 retired CONF_* / DEFAULT_* constants from const.py: sleep_brightness, sleep_rgb_or_color_temp, sleep_color_temp, sleep_rgb_color, sleep_transition, adapt_until_sleep, sunrise_time, min_sunrise_time, max_sunrise_time, sunrise_offset, sunset_time, min_sunset_time, max_sunset_time, sunset_offset, brightness_mode, brightness_mode_time_dark, brightness_mode_time_light, take_over_control, take_over_control_mode, detect_non_ha_changes, autoreset_control, only_once, adapt_only_on_bare_turn_on. [R8]
• 1.2 Trim VALIDATION_TUPLES to the 16 retained upstream entries plus 2 new sun-entity entries (target: 18 total). Also prune EXTRA_VALIDATION of orphaned keys. [R8]
• 1.3 Add CONF_SUNRISE_ENTITY = "sunrise_entity" / DEFAULT_SUNRISE_ENTITY = "sensor.sun_next_rising" and the _SUNSET_ pair. [R3]
• 1.4 Add RAMP_HALF_WIDTH_SECONDS = 1800 with an inline comment naming the design choice (30-min eye-friendly transition). [R4, D15]
• 1.5 Bump manifest.json to version: "2.0.0-cdit.1", add "homeassistant": "2025.1.0", update codeowners to CDiT-dev maintainers, point documentation / issue_tracker at the fork URL. [R8, D4, D13]

2. Foundation — strip dead code from switch.py

• 2.1 Delete the sleep-mode switch entity class and its unique_id pattern from switch.py. The integration now creates 3 switches per AL config (master, adapt_brightness, adapt_color), not 4. [D7]
• 2.2 Remove sleep-mode state machine from the master AdaptiveSwitch class (sleep transition logic, sleep brightness override, adapt_until_sleep handling). [D7]
• 2.3 Remove the take-over-control state machine: _manual_control tracking, _autoreset_handle, detect_non_ha_changes polling, only_once short-circuits, adapt_only_on_bare_turn_on checks. [D8]
• 2.4 Audit remaining switch.py for references to removed CONF_* keys and delete dead branches. Lint must pass. [D7, D8]

3. Config flow — sectioned schema

• 3.1 Replace the flat VALIDATION_TUPLES loop in config_flow.py with a hand-shaped builder that returns a vol.Schema containing six section()-wrapped subschemas: Targets, Daytime curve, Sun schedule, Light control, Advanced (collapsed), Diagnostics (collapsed). [R1, D1]
• 3.2 Wire each field's selector per the table in R5: NumberSelector (slider mode for brightness 1–100 / step 1 / %; box-or-slider for color temp 1000–10000 / step 100 / K), BooleanSelector, EntitySelector(domain="light", multiple=True) for lights, EntitySelector(domain="sensor", device_class="timestamp") for the two sun entities. [R5, D5, D14]
• 3.3 Implement conditional visibility for send_split_delay (driver: separate_turn_on_commands). The schema builder reads the current options/draft state and omits send_split_delay when the driver is false. [R2, D9]
• 3.4 Move include_config_in_attributes into the Diagnostics collapsed subsection. [R1]
• 3.5 Verify that no field appears in more than one section (spec R1 scenario 2). [R1]

4. Config flow — reload-on-save and YAML-managed abort

• 4.1 Change OptionsFlow → OptionsFlowWithReload in config_flow.py. Drop any custom async_reload / async_unload_entry plumbing that exists today for reload purposes. [R6, D6]
• 4.2 In the options flow's async_step_init, detect config_entry.source == SOURCE_IMPORT and return self.async_abort(reason="yaml_managed"). [R7]
• 4.3 Confirm via manual test that toggling a field and saving reloads the integration with no "restart HA" prompt, and that entity IDs of the AL switches are preserved across the reload. [R6]

5. Curve math — entity reads + synthetic tanh

• 5.1 Add a today_sun_events(hass, entry) helper in __init__.py (or a new sun.py module) that reads entry.options[CONF_SUNRISE_ENTITY] and _SUNSET_ENTITY, fetches their state via hass.states.get(...), parses the timestamp, and handles the "next_rising flipped to tomorrow after sunrise" case by anchoring today's curve from whichever event is in the past. Returns (today_sunrise_dt, today_sunset_dt). [R3, D2]
• 5.2 Add a pure tanh_curve(now, t_start, t_end, value_min, value_max, half_width=RAMP_HALF_WIDTH_SECONDS) function. Returns value_min outside the active window, ramps via tanh between (t_start - half_width, t_start + half_width), holds at value_max between (t_start + half_width, t_end - half_width), ramps back via tanh between (t_end - half_width, t_end + half_width). [R4, D11]
• 5.3 Replace upstream's astral-driven brightness and color-temp computation with two calls to tanh_curve — one for brightness using min_brightness / max_brightness, one for color temp using min_color_temp / max_color_temp. Same (t_sunrise, t_sunset) inputs for both. [R4]
• 5.4 Verify the curve evaluation path no longer imports astral.sun. (astral may remain a transitive dep for now; pruning it is a follow-up.) [D2]

6. async_setup_entry guards

• 6.1 At the top of async_setup_entry in __init__.py, check config_entry.version against the current major (2). If older, raise ConfigEntryError with a user-facing message: "Adaptive Lighting v2 (CDiT fork) is incompatible with the existing config entry. Delete and recreate the entry from Settings → Devices & Services." [R8, D4]
• 6.2 Add a sleep-switch tombstone helper: scan entity_registry for entities whose unique_id matches the historical <entry.entry_id>_sleep_mode_* pattern, call entity_registry.async_remove(entity_id) on each match, log INFO per removal with the entity ID. [R9, D12]
• 6.3 Ensure the tombstone helper is idempotent — a second async_setup_entry call finds nothing and emits no log lines. [R9]
• 6.4 Confirm the helper only removes entities whose config_entry_id matches the current entry (does not touch foreign entities matching the name pattern). [R9, D12]

7. Tests

• 7.1 Delete obsolete test files: tests/test_*sleep*, tests/test_*take_over*, tests/test_*manual_control*. Update tests/conftest.py to drop fixtures that referenced those features. [D7, D8]
• 7.2 Add test: section layout — opening options on a UI-managed entry returns a flow result with six labeled sections in the specified order; Advanced and Diagnostics collapsed. [R1]
• 7.3 Add test: each field appears in exactly one section, matching the R1 table. [R1]
• 7.4 Add test: send_split_delay is absent from the schema when separate_turn_on_commands is false; present when true. [R2]
• 7.5 Add test: sunrise_entity / sunset_entity default to sensor.sun_next_rising / sensor.sun_next_setting on a freshly created entry. [R3]
• 7.6 Add test: entity selectors for the two sun fields are configured with domain="sensor" and device_class="timestamp". [R3, D14]
• 7.7 Add test: tanh_curve returns value_min more than half_width before t_start, midpoint at exactly t_start, value_max more than half_width after t_start (and the symmetric trio around t_end). [R4]
• 7.8 Add test: color temperature uses the same curve shape as brightness, with min_color_temp / max_color_temp as bounds. [R4]
• 7.9 Add test: NumberSelector types, ranges, units, and modes match the R5 table for brightness, color temp, durations, and milliseconds. [R5]
• 7.10 Add test: saving valid options invokes async_unload_entry and async_setup_entry exactly once each (use mock spies) and produces no "restart HA" prompt. [R6]
• 7.11 Add test: opening the options flow on a SOURCE_IMPORT config entry returns async_abort(reason="yaml_managed"). [R7]
• 7.12 Add test: async_setup_entry raises ConfigEntryError when config_entry.version == 1 and current is 2. [R8]
• 7.13 Add test: async_setup_entry succeeds and runs no tombstone log line when entry version is current. [R8]
• 7.14 Add test: the tombstone helper removes a seeded switch.adaptive_lighting_sleep_mode_<name> entity owned by this config entry, emits one INFO log line. [R9, D12]
• 7.15 Add test: tombstone helper is idempotent — second run finds nothing, no log line. [R9]
• 7.16 Add test: tombstone helper does not remove a foreign-owned entity matching the name pattern (different config_entry_id). [R9, D12]

8. Strings and translations

• 8.1 In strings.json, add section labels (section.targets.name, section.daytime_curve.name, etc.) and short descriptions per section. Add field labels for sunrise_entity / sunset_entity. [R1, R3]
• 8.2 In strings.json, add the yaml_managed abort reason text: "This Adaptive Lighting config entry is managed from configuration.yaml. Edit it there to change options." [R7]
• 8.3 In strings.json, add the version-incompatible error: "This entry was created with an older, incompatible version. Delete it and create a new one." [R8]
• 8.4 Remove strings.json keys for the 21 deleted fields and the sleep switch entity. [R1, D7]
• 8.5 Mirror the additions/removals in translations/en.json. Other locales (de, fr, etc.) are out of scope and may diverge until a follow-up change. [R1]

9. Docs — README and CHANGELOG

• 9.1 Replace the upstream README's "Installation" / "Configuration" sections (or add a CDiT-specific preamble at the top) explicitly stating: "This is a CDiT fork. Existing upstream config entries WILL NOT load; recreate them after upgrade." Reference the migration steps from design.md §Migration Plan. [D4]
• 9.2 Add a "Recommended companions" section to README mentioning Sun2 as a HACS-installable source for precise civil / nautical / astronomical twilight sensors. Show the example of pointing sunrise_entity at sensor.sun2_astro_dawn. [D2, D14]
• 9.3 Write CHANGELOG.md (or append to existing) entry for 2.0.0-cdit.1: the 21 removed fields by name, the 2 added fields, the 1 removed entity, the breaking config-entry behavior, and the explicit recreate workflow. [D4]
• 9.4 Update the fork's GitHub repo description and topics to mark it as opinionated/fork (not a drop-in replacement). [D4]