Aleph

/aleph - External Memory Workflow

Core rule: keep whole contexts out of the prompt. Return only focused slices or compact derived results.

This plugin bundles the Aleph MCP launcher, /aleph skill, aleph-expert agent, and an install-check hook. It assumes the aleph executable is already installed and available on PATH.

Note: tool names may appear as mcp__aleph__load_workspace_manifest in some clients.

The 5-Phase Loop

1. Load

Pick the correct front door:

• Large repo or codebase: load_workspace_manifest(...)
• Single large file: load_file(...)
• Inline or generated content: load_context(...)

Repo-scale default:

load_workspace_manifest(paths=["src", "tests"], context_id="repo")
rg_search(
  pattern="FastAPI|APIRouter|router\\.",
  paths=["src", "tests"],
  load_context_id="routes"
)
load_file(path="pyproject.toml", context_id="pyproject")

Single-file default:

load_file(path="/absolute/path/to/large.log", context_id="log")
search_context(pattern="ERROR|WARN", context_id="log")
peek_context(context_id="log", start=1, end=60, unit="lines")

Do not start repo work by reading files one by one when load_workspace_manifest(...) is the right first move.

2. Orient

• Use search_context(...) to find relevant regions
• Use peek_context(...) to inspect small ranges
• Use semantic_search(...) for meaning-based lookup
• Use chunk_context(...) when navigability matters
• Use rg_search(...) to sweep repo trees quickly

Search before peeking. Pull only the slices you need.

3. Compute

• Use exec_python(...) for heavier analysis with ctx bound in the sandbox
• Aleph defaults to output_feedback="full"; exec_python(...) is not

print-only

• In full mode Aleph can return stdout, stderr, error text, and a rendered

return value

• If output volume becomes distracting, optionally use

configure(output_feedback="metadata")

• Use built-in helpers such as search, peek, lines, chunk,

extract_*, semantic_search, and cite

• Store compact derived values in variables like summary, counts,

matches, or result

• Retrieve only those derived values with get_variable(...)
• Treat get_variable("ctx") as blocked for plugin workflows; use bounded

slices or compact derived variables instead

Example:

exec_python(code="""
matches = search(r"ERROR|WARN")
counts = {"matches": len(matches)}
summary = f"{counts['matches']} matching lines"
""", context_id="log")
get_variable(name="summary", context_id="log")

4. Recurse

Real recursion helper signatures:

sub_query(prompt, context_slice=None)
sub_query_batch(prompt, context_slices, limit=None)
sub_query_map(prompts, context_slices=None, limit=None, parallel=True)
sub_aleph(query, context=None)

Runtime guidance:

• Use sub_query_batch(...) for one prompt over many slices
• Use sub_query_map(...) for distinct prompts, keeping parallel=True unless

you need sequential execution

• Use configure(sub_query_share_session=true) when nested agents need access

to parent contexts

• For depth 3+, use configure(sub_query_timeout=300, sandbox_timeout=300)

5. Converge

• Use evaluate_progress(...) when the answer is not yet stable
• Loop back through orient and compute when confidence is low
• Use summarize_so_far(...) if the trajectory is getting long
• Use finalize(answer=..., confidence=..., context_id=...) when done

Depth Invocation

Users can request a specific recursion depth with /aleph N target.

| Invocation | Depth | Strategy | |-----------|-------|----------| | /aleph file.py | 1 | Direct file analysis with load_file, search_context, peek_context, exec_python | | /aleph repo/ | 1 | Repo analysis with load_workspace_manifest, rg_search, targeted load_file, exec_python | | /aleph 2 file.py | 2 | Fan-out with sub_query_batch or sub_query_map | | /aleph 3 file.py | 3 | Recursive sub_aleph with longer timeouts | | /aleph 4 file.py | 4 | Deep recursion with explicit timeout tuning |

Escalation rule:

• Start at depth 1
• Move to depth 2 when the answer needs chunk-level fan-out
• Move to depth 3 or 4 only when nested structure or recursive synthesis is

required

Repo vs File Workflow

When the user points at a repo, codebase, or project tree:

• Start with load_workspace_manifest(...)
• Use rg_search(...) to locate candidate files
• Load only the files you actually need with load_file(...)
• Compute inside Aleph instead of pasting file contents into the prompt

When the user points at one large file:

• Start with load_file(...)
• Search, peek, and compute inside Aleph
• Pull back only the answer, a small slice, or a compact derived value

Anti-Patterns

• Using read_file(...) as the default entry point for large files or repos
• Loading a whole repo file-by-file when load_workspace_manifest(...) is the

better first step

• Treating get_variable("ctx") as a valid plugin workflow
• Pasting raw file or repo content into the prompt when Aleph can search or

compute instead

• Claiming that exec_python(...) only returns print() output
• Pinning a nested API backend in the checked-in plugin wrapper

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: Hmbown
• Source: Hmbown/aleph
• License: MIT
• Homepage: https://aleph-web.pages.dev/

Install and usage instructions live in the source repository linked above.