# The task shapes the work.

Changed wishes, a lost resource, nested Work, a missing pure capability and a new implementation are five different reasons for work to take a new shape.

Visitor question: What does growth or morphogenesis mean in the implemented system?

Genre: explanation. Website explanation · Updated 2026-10-02.

## Five changes, five different mechanisms

Growth, morphogenesis, nested Work and composition describe related questions. They should lead to a concrete change in the work that runs. Changing a parameter, retaining a child result, obtaining a known capability and writing new implementation code are distinct operations. The following five routes show where each happens and what their evidence supports.

## Changed wishes become changed computation

In [Wedding W3](/demonstrations/wedding/#semantic-changes), Gemini returns objectives and typed amendments that become compiler inputs. Protected conditions remain in force while the revised problem can produce a different arrangement. A later SR3 request asks for validation, so the programme validates and consumes the existing arrangement without another solve.

That is a change in the requested computation. It does not require inventing a new capability implementation. The model supplies bounded semantic material; runtime checks and materialises the supported Work. The Wedding Reader preserves the exact returned fields, their consumer and the distinction between W3 and the separate W4 hardware episode.

## A lost resource changes the affected branch

In [Workspace EWS3R2](/demonstrations/workspace/), an AudioSink process stops with return code −9. Continued media Work changes from four to sixteen frames while the existing PCM count stays 16,000. Photograph production remains at three, with the previous preview hash retained. The downstream consumer names both the recomputed and the preserved result.

This is selective continuation: recompute what depended on the changed resource and retain what is still useful. A fresh observation supplies the new basis. It does not renew the old action packet; saving still has its own current approval.

## Keep one child result and recompute another

A parent Work item needs the child's actual output, including its type and identity. In the inspected current composition implementation, `WorkOutputBindingV01` names `predecessor_work_id`, `output_field` and `expected_type`. `WorkHistoricalOutputV01` additionally binds task, revision, invocation, result, admission and artifact identity to the retained value. A result cannot become a useful parent input merely by appearing in a summary.

The U4 checkpoint reports four retained combinations: native/legacy paths × selected child 0/child 1. The parent consumes the retained child's exact result together with the newly computed selected child's result in canonical slot order. The read-only test source supplies a compact view of the relation:

```python
assert len(retained.retained_consumptions) == 1 and len(retained.cell_results) == 2
consumption = retained.retained_consumptions[0]
parent_result = next(r for r in retained.cell_results if r.parent_cell_id is None)
fresh_result = next(r for r in retained.cell_results if r.parent_cell_id is not None)
```

These exact lines are from [tests/test_work_composition_v01.py](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/tests/test_work_composition_v01.py) lines 933–936, at ref `62716374021e273b46878a824af39c1a94593cd7`. The following assertions (937–943) bind the fresh child, preserved original result, canonical parent order and absence of a new queue entry for the retained child. The two new results are the fresh child and parent; the retained child is consumed separately. The site has inspected this test source, not run it. Code attribution: Hedgehog OS, `AGPL-3.0-only`.

The [historical implementation checkpoint](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/docs/common_action_and_dynamic_composition_checkpoint_v01.md) supplies the recorded U4 execution scope. The [accepted publication ledger S11](https://github.com/AAkhtanin/hedgehog-os/blob/800f38c3407b3f4ec93dc943c977ffeecb614881/docs/showcase/radiolaria_os_v01/references/experience/source_ledger.md) distinguishes implemented composition, source assertions and checkpoint-reported execution. No raw U4 archive is presented here as newly revalidated.

## Missing a pure capability? Find, review and continue

Work can discover a missing implementation during its own continuation. `observe_missing_pure_need_v01` requires an actual `NEEDS_CAPABILITY` result without an invocation or output. It resolves the item's real input and binds the need to the current task, revision, topology and source. The need is more specific than an initial free-text search.

The bounded memory path then:

1. Searches local DRS with current Host time and exact contract, owner, memory-scope and profile filters.
2. Requires a unique eligible candidate and checks temporal fitness and ranking.
3. Obtains Root-reviewed descent for one artifact with an explicit byte budget.
4. Reads the bounded payload, checks its hash and independently admits the pure implementation again.
5. Installs the admitted capability through the continuing Work path, executes it and binds its output to the next consumer.

The decisive source operation is visible in [capability_memory_binding_v01.py](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/hedgehog/capability_memory_binding_v01.py), `retrieve_pure_memory_v01`, lines 338–341:

```python
data,wasm=_source_payload(payload,need)
attempt,package=pure.admit_pure_candidate_v01(host,need=need,source=wasm,source_format='wasm',contract_version=data['contract_version'],
    expected_revision=host.state_revision)
_require(package is not None,'pure_memory_readmission:'+str(attempt.reason))
```

Finding the remembered source is followed by current admission. Code attribution: Hedgehog OS, `AGPL-3.0-only`. This excerpt is data for inspection.

The U3 checkpoint reports one cold generation and zero warm generations, with admission on both paths. The [continuation test source](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/tests/test_work_continuation_and_reuse_v01.py), `test_u3_cold_warm_actual_same_task_and_canonical_report`, checks that each path resumes its own existing task from `NEEDS_CAPABILITY` to `COMPLETED`, and that the `need` output becomes the `render` invocation input. Cold and warm are distinct tasks; “same task” refers to continuity within each one. The current retrieval Root result is `ACCEPT` with `permission_created=false`.

This is a finite local pure-capability route. The inspected implementation and checkpoint do not demonstrate arbitrary child-local DRS search at every nesting depth, general autonomous programming or isolation of arbitrary native plugins. A conceptual relationship between mechanisms does not establish their unrestricted recursive combination.

## No implementation exists: author it and admit it

Retrieval reuses an existing capability. [Football authorship](/build/football-authorship/) addresses a different task: an outside AI receives HOW (interfaces and method) and WHAT (the domain problem), creates candidate code and submits it to separate examination. Accepted G54D1 passed 16 native cases; examination and owner source admission remain separate from the author.

A new admitted implementation still needs current inputs and local decisions before a business effect. [Workshop](/workshop/) explains the practical human roles that organise this work: framing, architecture, execution, review and owner acceptance. The integrated automatic Factory remains future work; the existing authoring experiment and bounded pure generation are not that whole programme.

## Use the current route, preserve the historical scope

The [architecture lock](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/specs/current_architecture_lock_v01.md) directs readers to bounded common action, retained results and local reuse. Its historical “Contract Only” block refers to an earlier basis. The [retired inventory](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/release/retired_architecture_inventory_v01.json) explicitly classifies `fractal_dag_executor.py` and the old architect/executor/orchestrator modules as `RETIRED_RUNTIME_REFERENCE`. Their early placeholders cannot define the present composition implementation.

This page follows [work_composition_v01.py](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/hedgehog/kernel/work_composition_v01.py), the current memory binding, the checkpoint and publication ledger. Those sources carry different evidence roles. Reading them creates no new acceptance result, and a historical pending caption does not silently become a statement about the entire later publication.

## This is the same kernel

[Experience](/demonstrations/experience/) changes where finite work is spent; [External DRS](/demonstrations/external-drs/) turns released evidence into checked local input. Both depend on an actual consumer and current grounds for use. [One kernel](/understand/one-kernel/) connects these relations, while [GEO-1, GEO-3, GEO-4 and GEO-7](/research/geometry/) distinguish composition, continuation, qualification and creation.

## Recorded fields and their scope

### An actual retained child result reaches the parent

Current test-source assertions bind one retained consumption, a fresh child and the parent in canonical slot order; the historical U4 checkpoint reports the finite execution matrix.

Record: **tests/test_work_composition_v01.py:933-943**. Class: inspected implementation and test source with checkpoint report. Scope: Read-only source inspection, no new test run or raw U4 archive revalidation. Arbitrary child-local memory search is not established.

- `source lines 933-936`: `one retained consumption; two newly returned cell results: fresh child and parent`
- `source line 942`: `parent_result.ordered_child_result_ids == tuple(by_cell[c] for c in root_input.ordered_planned_child_cell_ids)`

[View source — tests/test_work_composition_v01.py:933-943](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/tests/test_work_composition_v01.py)

### An observed missing capability becomes a continued task

The current need binds actual input; memory retrieval performs fresh readmission before continuation and typed output consumption.

Record: **retrieve_pure_memory_v01; test_u3_cold_warm_actual_same_task_and_canonical_report**. Class: inspected implementation and test source with checkpoint report. Scope: Finite pure capability; local DRS. Historical cold generation 1/warm 0 is checkpoint-reported, not newly executed.

- `retrieve_pure_memory_v01 lines 338-341`: `payload source → admit_pure_candidate_v01 → required non-null package`
- `test_u3_cold_warm_actual_same_task_and_canonical_report`: `render input equals actual need output; current retrieval Root ACCEPT creates no permission`

[View source — retrieve_pure_memory_v01; test_u3_cold_warm_actual_same_task_and_canonical_report](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/hedgehog/capability_memory_binding_v01.py)

## Sources and scope

- [Architecture lock at navigation snapshot N](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/specs/current_architecture_lock_v01.md) — architecture navigation with historical scoped statuses; ref `62716374021e273b46878a824af39c1a94593cd7`; path `specs/current_architecture_lock_v01.md`. Source date: navigation snapshot 2026-10-01. Access: Read-only local Git object; selected source passages inspected; anonymous HTTP not checked by this source-reading pass; checked 2026-10-02.
- [Retired architecture inventory](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/release/retired_architecture_inventory_v01.json) — retired source classification not runtime authority; ref `62716374021e273b46878a824af39c1a94593cd7`; path `release/retired_architecture_inventory_v01.json`. Source date: navigation snapshot 2026-10-01. Access: Read-only local Git object; selected source passages inspected; anonymous HTTP not checked by this source-reading pass; checked 2026-10-02.
- [Common action and dynamic composition checkpoint](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/docs/common_action_and_dynamic_composition_checkpoint_v01.md) — historical checkpoint report not new execution; ref `62716374021e273b46878a824af39c1a94593cd7`; path `docs/common_action_and_dynamic_composition_checkpoint_v01.md`. Source date: navigation snapshot 2026-10-01. Access: Read-only local Git object; selected source passages inspected; anonymous HTTP not checked by this source-reading pass; checked 2026-10-02.
- [Current Work composition source](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/hedgehog/kernel/work_composition_v01.py) — inspected source not executed; ref `62716374021e273b46878a824af39c1a94593cd7`; path `hedgehog/kernel/work_composition_v01.py`. Source date: navigation snapshot 2026-10-01. Access: Read-only local Git object; selected source passages inspected; anonymous HTTP not checked by this source-reading pass; checked 2026-10-02.
- [Current pure-capability memory binding](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/hedgehog/capability_memory_binding_v01.py) — inspected source not executed; ref `62716374021e273b46878a824af39c1a94593cd7`; path `hedgehog/capability_memory_binding_v01.py`. Source date: navigation snapshot 2026-10-01. Access: Read-only local Git object; selected source passages inspected; anonymous HTTP not checked by this source-reading pass; checked 2026-10-02.
- [Retained child and parent consumer assertions](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/tests/test_work_composition_v01.py) — test source witness not executed; ref `62716374021e273b46878a824af39c1a94593cd7`; path `tests/test_work_composition_v01.py`. Source date: navigation snapshot 2026-10-01. Access: Read-only local Git object; selected source passages inspected; anonymous HTTP not checked by this source-reading pass; checked 2026-10-02.
- [Pure-capability continuation assertions](https://github.com/AAkhtanin/hedgehog-os/blob/62716374021e273b46878a824af39c1a94593cd7/tests/test_work_continuation_and_reuse_v01.py) — test source witness not executed; ref `62716374021e273b46878a824af39c1a94593cd7`; path `tests/test_work_continuation_and_reuse_v01.py`. Source date: navigation snapshot 2026-10-01. Access: Read-only local Git object; selected source passages inspected; anonymous HTTP not checked by this source-reading pass; checked 2026-10-02.
- [Experience source ledger](https://github.com/AAkhtanin/hedgehog-os/blob/800f38c3407b3f4ec93dc943c977ffeecb614881/docs/showcase/radiolaria_os_v01/references/experience/source_ledger.md) — publication source ledger selected S05 S06 S08 S10 S11 S12; ref `800f38c3407b3f4ec93dc943c977ffeecb614881`; path `docs/showcase/radiolaria_os_v01/references/experience/source_ledger.md`. Source date: publication snapshot 2026-09-29. Access: Read-only local Git object; selected source passages inspected; anonymous HTTP not checked by this source-reading pass; checked 2026-10-02.
- [Wedding: changing a plan](https://github.com/AAkhtanin/hedgehog-os/blob/800f38c3407b3f4ec93dc943c977ffeecb614881/docs/showcase/radiolaria_os_v01/chapters/08_wedding.md) — publication explanation; ref `800f38c3407b3f4ec93dc943c977ffeecb614881`; path `docs/showcase/radiolaria_os_v01/chapters/08_wedding.md`. Source date: 2026-09-29. Access: HTTP_200; complete chapter text read; checked 2026-10-02.
- [Workspace: useful work continues](https://github.com/AAkhtanin/hedgehog-os/blob/800f38c3407b3f4ec93dc943c977ffeecb614881/docs/showcase/radiolaria_os_v01/chapters/09_workspace.md) — publication explanation; ref `800f38c3407b3f4ec93dc943c977ffeecb614881`; path `docs/showcase/radiolaria_os_v01/chapters/09_workspace.md`. Source date: 2026-09-29. Access: HTTP_200; complete chapter text read; checked 2026-10-02.
- [HOW: bounded extension interfaces](https://github.com/AAkhtanin/hedgehog-os/blob/800f38c3407b3f4ec93dc943c977ffeecb614881/docs/gate5_authoring_kit_v01/HOW_TO_BUILD.md) — frozen historical authoring kit; ref `800f38c3407b3f4ec93dc943c977ffeecb614881`; path `docs/gate5_authoring_kit_v01/HOW_TO_BUILD.md`. Source date: 2026-09-29. Access: HTTP_200; text read; checked 2026-10-02.
- [WHAT: historical Football task](https://github.com/AAkhtanin/hedgehog-os/blob/800f38c3407b3f4ec93dc943c977ffeecb614881/docs/gate5_authoring_kit_v01/WHAT_TO_BUILD.md) — frozen historical authoring kit; ref `800f38c3407b3f4ec93dc943c977ffeecb614881`; path `docs/gate5_authoring_kit_v01/WHAT_TO_BUILD.md`. Source date: 2026-09-29. Access: HTTP_200; text read; checked 2026-10-02.

This page is a website explanation, updated 2026-10-02. Its explanation does not create a new execution result or change the status of its sources.

## Continue reading

- [Different demonstrations. One execution model.](/understand/one-kernel/)
- [The model changed the requirements. The work changed with them.](/demonstrations/wedding/)
- [Ephemeral Computer](/demonstrations/workspace/)
- [Same budget. Different work.](/demonstrations/experience/)
- [An outside AI built the domain. It could not admit itself.](/build/football-authorship/)
- [Radiolaria is built the way it runs.](/workshop/)
- [Seven views of the same activity.](/research/geometry/)