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Harness Runtime Substrate Fitness

Layer 1 of 9 — the physical body of the harness · v0.1 active implementation
100%
Runtime Substrate Overall Fitness
20 capabilities · ALL 20 SEALED at 100% · live progress also in Harness Reactor v2
Capability Matrix
File Ops
1
File Read
Harness can read files from allowed workspace paths.
Atoms, Molecules
100%
PROVEN
→ → sealed — ready for Atom construction
2
File Write
Harness can write files to allowed workspace paths.
Atoms, Molecules
100%
PROVEN
→ → sealed — ready for Atom construction
3
Directory Create
Harness can create run folders and nested artifact directories.
Atoms
100%
PROVEN
→ → sealed — ready for Atom construction
Artifact Ops
4
Artifact Save
Harness can save named artifacts with stable paths.
ArtifactSave molecule, proof packets
100%
PROVEN
→ → sealed — ready for Atom construction
Shell Ops
5
Shell Command Execution
Harness can run approved local commands with allowlist enforcement.
Atoms, Molecules
100%
PROVEN
→ → sealed — ready for Atom construction
6
Stdout Capture
Capture standard output from shell commands
Atoms, Molecules
100%
PROVEN
→ ready for evidence/diagnostic consumers
7
Stderr Capture
Capture standard error output from shell commands
Atoms, Diagnostics
100%
PROVEN
→ ready for evidence/diagnostic consumers
8
Exit Code Capture
Capture process exit codes for success/failure branching
Atoms, Error Recovery
100%
PROVEN
→ ready for pass/fail gate consumers
Git/Diff Ops
9
Git Changed Files
Detect files changed in working tree via git diff --name-only
Atoms, Molecules
100%
PROVEN
→ ready for review packet consumers
10
Git Diff Capture
Capture full git diff output including staged and unstaged
Atoms, Molecules, Review
100%
PROVEN
→ ready for evidence chain consumers
Schema & Ledger Ops
11
JSON Parse
Parse and validate JSON strings into structured data
Atoms, Molecules
100%
PROVEN
→ ready for schema/evidence consumers
12
JSON Schema Validation
Validate JSON against JSON Schema definitions
Atoms, Crystals
100%
PROVEN
→ ready for proof gate consumers
13
Ledger Append
Append structured entries to an append-only ledger
Molecules, Crystals
100%
PROVEN
→ ready for audit trail consumers
14
Ledger Read
Read and query entries from the append-only ledger
Molecules, Crystals
100%
PROVEN
→ ready for diagnostics/evidence consumers
Model, Agent & Safety Ops
15
Model Call
Invoke LLM model with prompt and receive structured response
Atoms, Primes, Engines
100%
PROVEN
→ simulated only — real providers future
16
Sub-Agent Spawn or Simulation
Spawn child agents with isolated context for parallel work
Primes, Engines
100%
PROVEN
→ simulated sub-agent only — real agents future
17
Intercom / Message Passing
Cross-agent message passing via shared namespace or IPC
Primes, Engines, Factories
100%
PROVEN
→ local-only intercom — no network messaging
18
Forbidden Path Guard
Validate file/command paths against a forbidden-path allowlist
Atoms, Safety
100%
PROVEN
→ real local path guard — blocks escapes
Evidence & Recovery Ops
19
Proof Packet Generation
Generate verifiable proof packets for crystal capability verification
Crystals, Primes
100%
PROVEN
→ packet generation only — no fake reviewer
20
Failure Recovery
Recover from tool failures with retries, fallbacks, and watchdog
All layers
100%
PROVEN
→ recovery planning only — no autonomous repair