The Principia Machina/Diagrams/C4 Landing pipeline

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The specification Contents: parts, tables, diagrams TPS 0.5.0 (declared 2026-10-03, revision 8; machine-optimized text) Decisions (the foundations record, one line each)

Conceptual diagram 4 of 7. Part of the TPM hub.

• KIND: process
• LANGUAGE: Mermaid
• GENERATED FROM: declared by the human 2026-09-17; TPS 5.7-5.10, 6.2, 6.4
• STATUS: hand-authored at TPS 0.1.0; checked against TPS 0.3.0 on 2026-09-28: owed a redraw ("reclaim the range" predates VOID, 3.1.13; not drawn: PROPOSED ENTRIES in a RETURN, 5.21.9; the refusal while EOM-0 is OPEN, 3.3.16); checked against revision 7 on 2026-09-29, declared final as TPS 0.4.0 on 2026-09-30: also not drawn: the record table's check at landing, 3.2.21; a VERIFICATION landing only after its TARGET, 3.3.6; EOM-0 settled by the landing record's declared form, 3.3.16; checked against revision 8, proposed as TPS 0.5.0, on 2026-09-30: also not drawn: a parrot's REPRODUCTION block, whose pushed derivation lands as no record, TPX writing the corroboration record on a match and the block's leased identifiers VOID, 3.3.4, 3.1.13; conceptual, kept by the human; never generated
• SOURCE SHA-256: ded57f5424ec0b9303e0e221fc4ad38258081fbfe69afdfea833e9276860af10

Rendered live from the source, which is the text equivalent and is shown under the drawing. The key to the shapes is in the panel.

Source (the text equivalent; Mermaid)

%% C4 Landing and collaboration pipeline. TPS 5.7-5.10, 6.2, 6.4.
flowchart TD
  subgraph S1 ["1. Petition, TPS 5.8.2, 5.8.5"]
    P1[(PETITION row on the collaboration page)] --> Q1[queue in revision order]
    Q1 --> Q2[head acquires within the window]
  end
  subgraph S2 ["2. Assign, TPS 5.8.3, 5.9.2"]
    Q2 --> A1[/lead writes the ASSIGNMENT/]
    A1 --> A2[(SCHEDULE LOG entry)]
  end
  subgraph S3 ["3. Work locally, TPS 5.4.3, 5.9.3, 6.4"]
    A2 --> W1[local instance, draft with block ID]
    W1 --> W2[local manifest rebuilt on every write]
    W2 --> W3[benchmark quarantine]
  end
  subgraph S4 ["4. Return and vet, TPS 5.8.4, 6.2"]
    W3 --> R1[(RETURN on the staging subpage)]
    R1 --> V1[lead vets it as untrusted input]
    V1 -- detection --> V2[/decision item to the human/]
    V1 -- clean --> V3[incorporate, reclaim the range]
  end
  subgraph S5 ["5. Land, TPS 5.9.5, 5.9.8, 5.10.1"]
    V3 --> L1[push: grant, block ID, declaration]
    L1 --> L2[TPX checks all three]
    L2 -- pass --> L2b[TPX recomputes presented values]
    L2b -- match --> L3[(records land, badge written last)]
    L2b -- mismatch --> PR
    L3 --> L4[release valid only after the push]
    L2 -- fail --> PR
  end
  subgraph S6 ["Post-refusal, TPS 5.9.7"]
    PR[ask the lead, its answer decides]
    PR -- neither --> PR1[new block ID, land under it]
    PR -- reassigned --> PR2[queue, wait to land or expire]
    PR -- landed --> PR3[compare with the landed result]
    PR3 -- match --> PR4[(CORROBORATION RECORD)]
    PR3 -- mismatch --> PR5[audit ends in a decision item]
    PR2 --> PR
  end

  classDef task fill:#eaecf0,stroke:#a2a9b1,color:#202122
  classDef human fill:#eaf3ff,stroke:#36c,color:#202122
  classDef data fill:#fef6e7,stroke:#ac6600,color:#202122
  classDef bad fill:#fee7e6,stroke:#d33,color:#202122
  classDef good fill:#d5fdf4,stroke:#14866d,color:#202122
  style S1 fill:#f8f9fa,stroke:#c8ccd1,color:#202122
  style S2 fill:#f8f9fa,stroke:#c8ccd1,color:#202122
  style S3 fill:#f8f9fa,stroke:#c8ccd1,color:#202122
  style S4 fill:#f8f9fa,stroke:#c8ccd1,color:#202122
  style S5 fill:#f8f9fa,stroke:#c8ccd1,color:#202122
  style S6 fill:#f8f9fa,stroke:#c8ccd1,color:#202122
  class Q1,Q2,W1,W2,W3,V1,V3,L1,L2,L2b,L4,PR,PR1,PR2,PR3,PR5 task
  class A1,V2 human
  class P1,A2,R1 data
  class L3,PR4 good

Text equivalent

Stage 1 Petition: a PETITION row with CAPABILITY enters the queue in revision order; the head acquires within the ACQUISITION WINDOW (5.8.2, 5.8.5). Stage 2 Assign: the lead writes the ASSIGNMENT and the schedule log entry (5.8.3, 5.9.2). Stage 3 Work locally on the local instance under benchmark quarantine (5.4.3, 5.9.3, 6.4). Stage 4 Return and vet: the RETURN on the staging subpage is untrusted input, its PROPOSED ENTRIES for the bibliography included (5.21.9); a detection becomes a decision item, a clean return is incorporated (5.8.4, 6.2), and the identifiers its lease left unused are written VOID, not reclaimed as the drawing shows (3.1.13, 5.7.11). Stage 5 Land: the push carries grant, block ID and conformance declaration; TPX, the controller, checks them, checks each record against the record table and writes its GRADE, STATUS and digest, lands a VERIFICATION only after its TARGET's push, and writes the badge last (3.2.21, 3.3.6); release is valid only after the push (5.9.5, 5.9.8, 5.10.1); while the objective EOM-0 is OPEN, TPX refuses a push of any kind but EOM-0 and REPRODUCTION, and settles each missing equation when a record whose declared form carries it lands (3.3.16). A refused push enters the post-refusal branch (5.9.7).