# Phase 0.9E independent rescue chain

Date: 2026-07-18

Decision: `BOOTSTRAP_IMPLEMENTATION_MISSING`

## Dependency graph

```mermaid
flowchart LR
    A["Operator trigger<br/>exact artifact missing"]
    B["Y2JB/browser exploit host<br/>opaque candidate only"]
    C["Rudimentary port-9020 listener<br/>implementation missing"]
    D["Host sender<br/>README concept only"]
    E["hardened elfldr-ps5.elf<br/>local reference build"]
    F["embedded bootstrap<br/>source design"]
    G["elfldr service :9021<br/>source design"]
    H["controlled Payload Manager<br/>offline reference build"]

    A --> B --> C
    D --> C
    C --> E --> F --> G --> H
```

| Node | Environment / side | State | Start/input/output | Dependencies | Device file / autoload | Recovery role | Evidence |
|---|---|---|---|---|---|---|---|
| operator trigger | host/browser | unknown | unknown | exact package | unknown | begins jailbreak session | `UNKNOWN` |
| Y2JB/exploit host | browser/host | unknown | opaque backup candidate | trigger/package | unknown | could recreate 9020 state | `POSSIBLE` |
| rudimentary loader | PS5 process/kernel context unknown | unknown | presumed listener on 9020 | exploit | unknown | candidate rescue executor | implementation missing |
| conceptual sender | host | temporary | host connects and streams an ELF per README | working listener | no sender-side device path | sends elfldr | architecture only |
| hardened elfldr bootstrap | PS5 | temporary entry, then background service design | final ELF embeds bootstrap and service | 9020 execution | source itself does not install, but performs documented process/kernel changes | creates port 9021 | exact local source, not deployed-use proof |
| elfldr service | PS5 process | background design | listens TCP 9021 | hardened bootstrap | no autoload source path | later payload executor | exact source, hardware unproven |
| controlled Manager | PS5 process | not installed in evidence | separate launch via elfldr | elfldr 9021 | controlled storage if used; no autoload | management layer | offline reference only |

No node before hardened elfldr has a source-bound executable identity.

## Required questions

1. **Who listens on 9020?** Unknown. The elfldr README calls it a
   “rudimentary ELF loader”; no implementation is present.
2. **Who starts it?** Presumably the exploit chain, but exact trigger and
   process are unknown.
3. **Before elfldr?** Architecturally yes; exact implementation proof is
   absent.
4. **Available again after reboot?** Plausible for a repeatable jailbreak, not
   proven for the used package.
5. **Requires working elfldr on filesystem?** Architecture says no; exact
   loader proof is absent, so `independent_from_elfldr=unproven`.
6. **Requires Payload Manager?** Architecture says no; exact proof is absent,
   so `independent_from_payload_manager=unproven`.
7. **Can it receive a payload directly?** The README assumes an elfldr ELF can
   be sent; limits and exact acceptance are unknown.
8. **Accepted format?** The sender streams ELF bytes. Server validation,
   container rules, and truncation behavior are unknown.
9. **Automatic execution?** Required by the described bootstrap, but no server
   source proves it.
10. **Writes a device file first?** Unknown.
11. **Can it execute without live replacement?** Plausible, not proven.
12. **Restart after a payload crash?** Unknown.
13. **Does reboot remove temporary state?** Plausible, not proven.
14. **Depends on autoload?** No architectural requirement is documented, but
    actual configuration is absent.
15. **Works with both later components absent?** Conceptual chain says yes;
    exact implementation is missing.
16. **Rescue without filesystem write?** Unknown.
17. **Independent result channel?** No exact result/output contract exists.
18. **Hardware-unproven aspects:** all process identities, boot persistence,
    port behavior, parser behavior, mapping/entry, file writes, cleanup,
    crash/hang response, and reboot recovery.

## Independence decision

An architectural diagram alone permits at most
`PARTIAL_RESCUE_EXECUTOR`. Here, the actual executable implementation itself
is unavailable, so the more precise required classification is:

`BOOTSTRAP_IMPLEMENTATION_MISSING`

This does not mean the chain is dependent; it means independence cannot be
audited. `phase09f_rescue_payload_design_allowed=false`.