feat(DEN-2443): expose native tasks through current zed CLI

[ORESoftware]

Scope

Reconstructs the canonical task dispatcher directly on current main 9b88ac2a1504b1571e045b57cb7efc5f315482f0, superseding the diverged 18-commit PR #211.

zed task [--plan zed-env.toml] [--json] list [--all]zed task [--plan zed-env.toml] [--json] info <task>zed task [--plan zed-env.toml] [--json] graph <task>zed task [--plan zed-env.toml] run <task> [--dry-run] [--yes] [--jobs N] [--no-cache] [-- <args>...]

One implementation

The already-merged schema-v2 task runtime remains unchanged. A shared zed_cli::task_cli layer owns list, info, graph, run, observer, positive-jobs, JSON/live-output, and human-format behavior. Both zed and zed-task map typed arguments into that single layer.

Five reusable files are byte-identical to the previously certified candidate. Five integrations were applied semantically to current main:

• .cli-flags.toml
• README.md
• src/cli.rs
• src/lib.rs
• src/main.rs

Compatibility contract

The canonical route reuses exactly:

• ZED_TASK_PLAN
• ZED_TASK_JSON
• ZED_TASK_ALL
• ZED_TASK_DRY_RUN
• ZED_TASK_YES
• ZED_TASK_JOBS
• ZED_TASK_NO_CACHE

zed-task remains a compatibility and focused certification binary. Zero concurrency is rejected during typed parsing; live child output cannot be mixed into JSON reports.

Focused validation completed

• task-runtime unit tests;
• shared task command tests;
• staged and canonical compiled CLI tests;
• byte-identical canonical/staged JSON and stderr parity;
• real dependency ordering and scalar environment propagation;
• Clap ↔ .cli-flags.toml parity;
• README command coverage;
• current asdf and global-profile compatibility tests;
• cargo fmt --all --check; and
• strict Clippy for zed, zed-task, and both task integration targets.

The permanent Ubuntu/macOS/Windows task workflow and ordinary exact-head repository matrix remain merge gates. Independent zed-pkg-test certification is pinned to exact candidate 4c708dcece916a81caace9d82083a523a297475c.

Linear: DEN-2443, DEN-1444, DEN-1435, DEN-2462

Superseded PR salvage

Supersedes: #211

• Salvaged byte-identically: shared command layer, staged binary, parity tests, task documentation, and permanent workflow.
• Reapplied semantically: typed dispatcher, main command routing, module export, flags registry, and README row.
• Discarded: 18-commit divergent branch history and stale base integrations.

[linear-code]

DEN-2443

DEN-2462