feat(dependencies): RFC 9253 per-endpoint blocking + status lifecycle categories

docs/features/task-management.md

@@ -153,7 +153,11 @@ Whenever a dependency is added, TaskNotes updates the upstream note’s `blockin
 - The task context menu provides the same selector, enabling dependency management directly from the Task List, Kanban, and calendar views.
 - Task cards show a fork icon whenever a task blocks other work. Clicking it expands an inline list of downstream tasks without triggering the parent card’s modal, so you can inspect dependents in place.
 
-These controls currently create and manage finish-to-start style blockers. Advanced `reltype` values and `gap` data are preserved in frontmatter, but blocking evaluation is currently based on whether unresolved dependencies exist rather than relationship-type-specific scheduling rules.
+By default, dependencies use finish-to-start. Enable **Features → Dependencies → Advanced dependency types** to choose a relationship type and an optional lag per dependency from both the "Blocked by" and "Blocking" lists in the edit modal.
+
+Blocking is evaluated per endpoint: finish-to-start and start-to-start gate a task's *start*, while finish-to-finish and start-to-finish gate its *finish*. An edge releases as soon as the predecessor reaches the point the relationship requires — started for a start-to-\* edge, completed for a finish-to-\* edge — so a task reads "Blocked · start" or "Blocked · finish" only while it is genuinely constrained.
+
+TaskNotes-rendered views (Task List, Kanban, cards) reflect this computed state. A native `.base` filter on "blocked by", however, matches by existence only: a Bases filter formula evaluates a single note's frontmatter and cannot read a predecessor's status, so it cannot distinguish a released edge from a live one. Use a TaskNotes-rendered view when you need constraint-aware blocking.
 
 ![Task context menu](../assets/feature-task-context-menu.png)
 

docs/releases/unreleased.md

@@ -31,3 +31,12 @@ When a change has user-facing documentation, include a canonical tasknotes.dev l
 ```
 
 -->
+
+## Added
+
+- Dependency blocking now distinguishes a task's start from its finish, following the predecessor relationship type (finish-to-start, start-to-start, finish-to-finish, start-to-finish). A task shows "Blocked · start" when it cannot begin yet and "Blocked · finish" when it can begin but cannot complete; the signal clears the moment the predecessor reaches the point the relationship requires — started for a start-to-* edge, completed for a finish-to-* edge. A satisfied dependency stays listed under the task but no longer counts toward the blocked signal.
+- The task edit modal can set each dependency's relationship type and an optional lag from both the "Blocked by" and "Blocking" lists, with a plain-language summary that names both tasks so the direction is never ambiguous. Editing a "Blocking" edge writes the relationship to the blocked task's own frontmatter. Advanced relationship types are off by default.
+
+## Changed
+
+- Task statuses now have a lifecycle category — Not started, Started, or Completed — shown as a pill in the status settings, replacing the previous "Completed" toggle. Existing completed statuses stay Completed; the rest default to Not started. If you keep a custom "in progress" status, set its category to **Started** in Settings → Task Properties so that start-based dependencies (start-to-start / start-to-finish) release when it begins — until then it is treated as Not started.

i18n.manifest.json

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@@ -704,7 +712,7 @@
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@@ -717,7 +725,7 @@
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@@ -727,6 +735,9 @@
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@@ -1561,6 +1572,26 @@
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@@ -1804,6 +1835,14 @@
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@@ -1986,9 +2025,15 @@
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