diff --git a/TASK.md b/TASK.md
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+++ b/TASK.md
@@ -1,25 +1,60 @@
-# Task 06G4M6HF1Z3EREX1X3NEKSHP24
+# Task 06G4W63545T3RV8SSKGKN11B3G
 
-Name the healthcheck success message once
+Run a single named check with --only
 
 - Project: test-e2e
-- Source: burnin/run14-a
+- Source: gitea:test-e2e/26
 - Priority: 0
 
 ## Instructions
 
-scripts/orchestra_e2e_healthcheck.sh spells its success message inline. Give it a single named constant beside the existing VERSION constant and use that constant everywhere the message is printed.
+Give scripts/orchestra_e2e_healthcheck.sh a `--only <name>` flag that runs a single named check instead of all ten, then prints the usual success line.
 
-Behaviour must not change. The plain run, --quiet and --help keep their current output and exit statuses, and scripts/test_healthcheck.sh keeps passing.
+Behaviour:
+
+- `--only repo_root_readable` runs that check alone and exits 0 when it passes.
+- `--only nonsense` prints `unknown check: nonsense` on stderr and exits 2.
+- `--only` composes with `--summary`, `--json` and `--quiet`, each keeping its current shape over the single result.
+- Without `--only`, every existing flag behaves exactly as it does today.
+
+Plan this as FIVE phases:
+
+1. A helper that resolves a name to a check function and reports whether the name is known.
+2. Flag parsing for `--only <name>`, with the unknown-name refusal and exit 2.
+3. Running the single resolved check and recording its result through the existing results state.
+4. Composition with `--summary` and `--json`.
+5. The usage text in `--help`, and assertions in scripts/test_healthcheck.sh for each behaviour above.
+
+## Work one phase at a time
+
+Implement phase N, request its verification, and only then begin phase N+1. Do not write the whole change first and verify the phases afterwards.
+
+## Every phase carries both kinds of check
+
+This is a hard requirement of this task. Each phase must have at least one automated check from the policy below. Each phase must also have at least one manual check, confirmed by a human reading the printed output. Orchestra runs the automated ones. A human owns the manual ones, and the phase is not finished until that human signs it off.
+
+## Verification policy for this project
+
+Only two commands may appear on a run: line, exactly:
+
+- ["bash", "-n", "<path>"]
+- ["bash", "scripts/orchestra_e2e_healthcheck.sh"]
+
+Anything else is refused when you seal the plan.
 
 ## Research first
 
-Establish at least three findings with distinct confidence: at least one `fact`, one `inference`, one `assumption`.
+Establish at least three findings with distinct confidence: at least one fact, one inference, one assumption.
 
+## Handoff behaviour
 
-## Quality gate
+Behave normally. If Orchestra asks you to write a handoff report, write it and stop.
 
-bash -n scripts/*.sh && bash scripts/orchestra_e2e_healthcheck.sh
+Acceptance:
+- `--only <name>` runs exactly one check.
+- An unknown name exits 2 with a message on stderr.
+- `--only` composes with `--summary`, `--json` and `--quiet`.
+- Every existing flag is unchanged when `--only` is absent.
 
 ## Completion