SSM-NET — Declared POST (6B)

Create with evidence: bind bytes, cite the rulebook, stamp continuity—then return a stamped result

Intent.
When a client creates or changes something, it should declare the rulebook, bind the exact on-wire bytes, and place the action in a single-link chain so the server (and any auditor) can replay integrity, order, and policy.

Sender (client) behavior.

# choose disclosure (prefer label-first)
disclosure := "value+band"   # value-only | value+band | full

# declare canonical subset (ordered, visible)
subset := ["value","band","manifest_id"]     # add "align_ascii" only if align is public

# hash the exact on-wire body bytes (if a body exists)
BODY_HEAD := SHA256(raw_body_bytes_on_wire)

# compute digest over declared bytes (+ body if declared)
HEAD := SHA256( serialize(subset) [+ raw_body_bytes_on_wire] )

# emit continuity stamp (append-only, single-link)
stamp := "SSMCLOCK1|<UTC_ISO>|nonce=<...>|sha256="+HEAD+"|prev=<HEX or NONE>"

# payload invariance (collapse parity)
phi((m,a)) = m

If full disclosure is required (optional).

# deterministic lane math (recap)
a_c := clamp(a_raw, -1+eps_a, +1-eps_a)
u   := atanh(a_c)
U  += w*u ; W += w
align := tanh( U / max(W, eps_w) )

# canonical decimal for public align
align_ascii := "+0.732000"   # fixed sign/precision; no locale separators

Receiver (server) behavior.

# 1) integrity over the exact bytes
HEAD_local := SHA256(serialize_declared_subset(e) [+ raw_body_bytes_on_wire_if_declared])
assert HEAD_local == parsed_head_from(e.stamp)

# 2) continuity (scope-local)
assert e.stamp.prev == local_HEAD or e.stamp.prev == "NONE"
local_HEAD := parsed_head_from(e.stamp)

# 3) policy replay
M := fetch_manifest(e.manifest_id)

if align is public:
  a_c := clamp(a_raw, -1+eps_a, +1-eps_a)
  u   := atanh(a_c)
  U  += w*u ; W += w
  align_local := tanh( U / max(W, eps_w) )
  assert cutpoint_map(align_local, M) == e.band
else:
  assert band_is_derivable(e.band, M)   # label-first

# 4) commit effect, then return a stamped response (new prev links to request HEAD)

Illustrative HTTP exchange (minimal).

POST /api/create
SSMNET-Manifest: NETWORK_POSTURE.DEMO
SSMNET-Disclosure: value+band
SSMNET-Canonical-Subset: ["value","band","manifest_id"]
SSMNET-Body-Hash: sha256=<B_REQ>
SSMNET-Stamp: SSMCLOCK1|2025-11-10T13:20:00Z|nA|sha256=<H_REQ>|prev=NONE

{ "value": { "title": "hello", "owner": "demo" } }

HTTP/1.1 201 Created
Location: /api/item/42
SSMNET-Manifest: NETWORK_POSTURE.DEMO
SSMNET-Band: A0
SSMNET-Canonical-Subset: ["value","band","manifest_id"]
SSMNET-Body-Hash: sha256=<B_RES>
SSMNET-Stamp: SSMCLOCK1|2025-11-10T13:20:01Z|nB|sha256=<H_RES>|prev=<H_REQ>

{ "value": { "id": 42, "status": "created" } }

Outcome.
Two stamps narrate the transaction—submission and creation—forming a replayable, append-only story with unchanged payload bytes, verified subset integrity, and manifest-mapped duty-of-care.

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